1. Olivia Wilde
We may not know a McDreamy from a McNugget, but when it comes to TV doctors, there is only one who makes our body temperature rise. The pulse-quickening internist played by Olivia Wilde on House, M.D. is named Thirteen (which we presume is out of 10) and has a terminal illness that causes her to dabble in drugs and casual sex. (That's how we want to go!) But we were drooling over this N.Y.C. native long before she was injected into Fox's hit medical drama. Roles on small-screen faves The Black Donnellys and The O.C. introduced Olivia to the world, but it's her prehistoric part in this month's Year One that will put her on top of it. As the object of Cro-Magnon lust in the Judd Apatow-produced, Harold Ramis-directed, Jack Black-starring comedy, Olivia will surely knock moviegoers back to the Stone Age. Ugh!2. Megan Fox
Seriously, do women get more painfully hot than this? Megan Fox has the face of an angel, a body so perfect that God may have carved it out of soap while in the shower, and sex appeal that could melt a unicorn’s horn. Plus, we hear she smells like clouds! Look for Megan as robot bait in Transformers: Revenge of the Fallen, a cheerleader in Jennifer’s Body, and a beauty beguiling Josh Brolin’s disfigured gunslinger in Jonah Hex. And look for us to keep typing “Megan Fox” in Google image search!3. Bar Refaeli
If there’s any evidence that the Middle East is a land of beauty and wonder—not just unending turbulence— Bar is it. The 24-year-old Israeli supermodel with the brain-blowing bod scorched the cover of the Sports Illustrated Swimsuit Issue this year, sending lonely high school gym coaches across the country into cardiac arrest at their mailboxes. These days, you can watch her hosting MTV’s House of Style—if you’re into that sort of thing. Or just keep staring at this incredibly hot photo.
4. Malin Akerman
In the dark world of Watchmen, Malin was tasked with one tough mission: distract moviegoers from Billy Crudup's 12-foot-long blue penis. She succeeded with flying colors--and a peelable latex costume. Watchmen wasn't the first time we've seen Malin (Who can forget her role in Harold & Kumar Go to White Castle?), and it won't be the last. She's got four new flicks on her busy schedule.5. Mila Kunis
When the cast of Forgetting Sarah Marshall tapped the Ukraine-born Kunis to play Jason Segel's rebound, who could have predicted that she would throw of the entire premise of the movie? Mila's combination of exotic beauty and girl-next-door charm would make any sane man forget his ex in three seconds flat. With the upcoming Mike Judge comedy this fall, she cements her sexpot status. For those of us who remember Mila as Ashton Kutcher's cute (but frankly annoying) girlfriend on That 70s Show, there are two questions: When did she get so insanely hot? And why is she still with Macaulay Culkin?! Maybe some things are better left unanswered.6. Eliza Dushku
On-screen in Fox’s Dollhouse, she’s a lethal hottie who can negotiate a hostage release or recover stolen art for the Greek government. Offscreen, she’s the show’s producer. Either way, you should stay on Eliza’s good side. In March, the former Angel and Buffy babe revealed to us that in addition to working 14-hour days doing many of her own stunts on the show, she still makes time for hygiene. “I love catching a glimpse of my tattoos when I strip down to take a shower.” Eliza, you’ve delivered a roundhouse kick to our heartstrings.7. Adriana Lima
With apologies to Mrs. Tom Brady, it’s Adriana who epitomizes the Brazilian bombshell— her killer curves, ridiculous sexiness, and adorable accent make this supermodel the hottest export from a nation stupid with smoking hot women. In addition to campaigns for Guess and Maybelline, the perfectly proportioned polyglot (she speaks Portuguese, English, and French) has been a Victoria’s Secret Angel for nine years running— yet somehow, we never tire of seeing her nearly naked. She broke our hearts when she married Memphis Grizzlies guard Marko Jaric, Commence hating Marko...now!8. Rihanna
Pop’s reigning princess has had a year of wild highs and lows, from two Grammy nods to a much-publicized altercation with R&B singer Chris Brown. But the Barbadian beauty—who picked up a don’t-mess- with-me pistol tat after the incident—is poised to return stronger than ever. Rumor has it she’s already begun recording her fourth album, the follow-up to 2007’s smash Good Girl Gone Bad. We’re dancing already!9. Jordana Brewster
No offense, Paul Walker, but this breathtaking daughter of a Brazilian swimsuit model and granddaughter of a Yale University president is the real reason the entire world went to see Fast & Furious. Paul! Wait. Come back. It’s nothing personal!10. Jennifer Love Hewitt
If you were finally getting over your 14-yearlong crush on JLH, we apologize for this picture, which will set your recovery back a good decade. Ever since she uttered her first, “Bailey!” on Party of Five, Love has been the object of many a man’s obsession. She left us high and dry for a bit, but her return to the tube on Ghost Whisperer gives us our weekly fix of Love and needy dead people.11. Jessica Biel
Jessica carved out a place in our dreams with an Oscar-worthy turn as a potential deli platter in The Texas Chainsaw Massacre. She’ll answer our special prayers again this year by playing a nympho in Nailed.12. Leighton Meester
She played an ever-aloof virginal pop princess on Entourage, and a few nights later on Gossip Girl she’s the vicious, love-to-hate-her Blair Waldorf. You vex us, Leighton.13. Jessica Alba
Even The Love Guru could do nothing to still our thumping hearts for this perennial hottie. We can’t wait for her to put her serious pants on in the upcoming drama An Invisible Sign of My Own. And in 2010 we’ll surely take our’s off to watch her reprise her role as a stripper in Sin City 2.14. Christina Aguilera
The hottest MILF in pop has big plans for her upcoming album. “The new material is a futuristic take on what is inspiring me. It’s got a popart feel,” she says. Fans of delicate harpsichord songs about the Renaissance should look elsewhere15. Katy Perry
When the preacher’s kid stormed the charts last summer with “I Kissed a Girl,” she inspired girl-on-girl fantasies not seen since Cagney met Lacey. She’s currently spreading her message of Sapphic love the world over with a cross-continental tour.16. Gina Carano
Gina went from bruisingly hot MMA fighter chick to bona fide TV star last year as “Crush” on American Gladiators. The undefeated ass-kicker returns to the cage later this year.17. Britney Spears
Call it a comeback! If there’s one thing America loves more than a pop tart falling from the heavens, it’s her ascendance back to sex symbol status from paparazzi punching bag. Hit us baby, one more time.
18. Marisa Miller
This California dream took the world by sexy storm last year when she burst on the scene as the first all-American supermodel since the heyday of Brinkley, Crawford, and Turlington. God bless the U.S.A.!19. Chan Marshall
The prolific indie crooner best known as Cat Power reworked her rebellious past and became the “Face of Chanel.” With her music featured in everything from jewelry ads to movie soundtracks, Cat owns your ears this year.
20. Moon Bloodgood
The former Laker Girl has emerged as the hottest thing known to man in Terminator Salvation. “I like to think I’m multifaceted. Sexy, but approachable.” So that means you’re dropping the restraining order?21. AnnaLynne McCord
She’s seduced men on Nip/Tuck, played a teen queen on the new 90210, and starred in Fired Up. Now prepare to gawk at the Southern belle in her next projects, Slaughter and Amexica. Ready?22. Kate Beckinsale
In the Underworld series she’s made several male childhood fantasies come to life (statuesque woman in leather would be plenty, but she also hunts werewolves). Next Kate takes on even bigger game: Everybody’s Fine, opposite Robert De Niro.23. Lindsay Lohan
No list of beauty would be complete without LiLo. You’ll soon be able to catch the sex icon in Labor Pains, a comedy in which she pretends to be preggers. We’re hoping it’s not ours.24. Eva Mendes
From her bare-assed PETA campaign to her photo shoot for Vogue Italia and her Calvin Klein perfume commercial that was too hot for the U.S., the sultry star of five upcoming flicks is having a hard time keeping her clothes on these days.25. Julianne Hough
The hot-stepping Dancing With the Stars hottie has moved on to country singing. Bust out the rhinestones and belt buckles!26. Angelina Jolie
She didn’t take home Best Actress honors for Changeling (or Best Tattooed Assassin for Wanted), and now Angelina is pissed. It’s why she signed on to replace Tom Cruise (seriously) in Salt, the story of a CIA agent accused of being a spy27. Vanessa Hudgens
Presenting the doe-eyed, perfectly proportioned, exquisitely multi-ethnic reason all three High School Musical films have found their way to our Netflix cue. For her next act, Vanessa vamps in the teen musical Bandslam, rocking into theaters next month.28. Danneel Harris
She's chosen roles as a hell-raiser on One Tree Hill, a fierce cheerleader in Fired Up, and, next, a girlfriend gone wild in Mardi Gras. We like the pattern we're seeing.29. Zoe Saldana
The New Jersey native earns her sexy stripes playing every fanboy’s fantasy, the communicative Lieutenant Uhura in Star Trek. She’s come a long way since being nominated for “Best Kiss” with the future Mr. Mariah Carey, Nick Cannon, at the 2003 MTV Movie Awards.30. Penélope Cruz
The smoldering Academy Award winner makes us want to shout things surrounded by upside-down exclamation points.31. Hilary Duff
She may be back in studio recording a new, sure-tobe- platinum album, but Hilary isn’t content just serenading the tween crowd. That’s why she’ll be playing machine-gun-wielding badass Bonnie Parker in the indie film The Story of Bonnie and Clyde.32. Ciara
Ciara put out her first album in three years with Fantasy Ride. The time away only made her naughtier, as demonstrated by the “Love Sex Magic” video and her lap dancing Justin Timberlake. Where’s a bouncer when you need one?
33. Blake Lively
We've never seen The Sisterhood of the Traveling Pants and have yet to watch Gossip Girl with the sound on, but with the upcoming New York, I Love You, TV's reigning all-American blonde is finally starring in something we may actually want to see.34. Scarlett Johansson
Last year she married Ryan Reynolds; this year she starred in He's Just Not That Into You. But this 24-year-old with the smoky voice and smoking body is already making amends by signing on to play Black Widow in Iron Man 2. Bring on the Spandex!35. Anna Kournikova
The tennis temptress ditched that racket in 2003 to focus on more worthwhile spectator sports like modeling and occasionally breaking up with Enrique Iglesias.36. Hayden Panettiere
What’s the one thing sexier than a hot high school cheerleader with superpowers (Heroes)? A hot high school chick who shows a dorky valedictorian the night of his life in I Love You, Beth Cooper.37. Cameron Diaz
The former Elite Model gets style points for kicking Justin Timberlake to the curb in 2007. Forbes named her Hollywood’s highest-paid actress in 2008. Hot and rich—just our type!38. Charlize Theron
The supersexy superstar appears next in The Road, based on the depressing book by Cormac McCarthy. Here’s to hoping they add a much-needed volleyball, pizza-party scene.39. Anna Faris
She served as E’s love interest in Entourage and played Seth Rogen’s girlfriend in the twisted comedy Observe and Report. Maybe we do have a shot with her!
40. Lily Allen
The biting lyrics from Lily’s albums, Alright, Still and It’s Not Me, It’s You, have proved she’s the most outspoken Brit crooner since the Gallagher brothers.
41. Nadine Velazquez
Nadine will hit the big screen next year in the comedy All’s Fair in Love, but in the meantime she continues dirtying up our thoughts as a motel maid on My Name Is Earl.42. Nikki Reed
We’ve wanted this sexy Twilight star to sink her teeth into us since her days on The O.C. Beware of the next Twilight installment, coming this November.
43. Elisha Cuthbert
The world’s hottest hockey fan has an NHL star (Calgary’s Dion Phaneuf) on her arm and a kick-ass role on her résumé now that she’s returned to 24 as Kim Bauer, the daughter of Dick Cheney’s favorite one-man terrorist wrecking crew.44. Avril Lavigne
Her “Girlfriend” video is tied with “The Evolution of Dance” as the most watched clip on YouTube. Seriously, “The Evolution of Dance,” people?45. Fergie
After proving she offered Black Eyed Peas more than just lady lumps with her smashtastic solo album, The Dutchess, Fergie has reunited with the boys on this month's The E.N.D.46. Nicole Scherzinger
From her rocking voice to her deadly curves to her insanely hot moves, this Pussycat Doll is a triple threat. Meow!47. Katie Cassidy
The star of Black Christmas and the miniseries murderfest Harper’s Island isn’t just a scream queen. She’ll be the next-gen Amanda on the CW’s Melrose Place remake.48. Arielle Kebbel
Cute-as-a-button Arielle made waves in the scary-as- hell movies The Uninvited and The Grudge 2. Next up, Mardi Gras, in which she shows us her…talents.49. Freida Pinto
You met her in Slumdog Millionaire, and now she’s got a bunch of new flicks in the works. We can’t wait to see more of her. And, yes, that’s our final answer.50. Taylor Swift
This singer-songwriter is richer (see her No. 1 album Fearless) and tall (six feet!) and has said she doesn’t want anyone “picturing me naked.” You can't always get what you want, Taylor.97. Marisa Tomei
We were psyched to see My Cousin Vinny's unlikely Oscar winner play a stripper in The Wrestler. We pray that her upcoming role in The Night Job, about an ex-con forced into framing a friend, is just as revealing.98. Rebecca Mader
This carrot-topped Brit made time travel worth watching this season on ABC's Lost as the feisty and ultimately doomed Charlotte Lewis.99. Melissa Rycroft
After having her heart broken by some douche on the The Bachelor, this former Dallas Cowboys cheerleader rebounded with a crowd-pleasing stint on Dancing With the Stars, proving that getting dumped can be a great career move.