Katy Perry fields questions from students at the GRAMMY SoundCheck at Cannery Ballroom on April 14, 2009 in Nashville, Tennessee. GRAMMY SoundCheck with Katy Perry Cannery Ballroom Nashville, TN United States April 14, 2009 Photo by Frederick Breedon/WireImage.com To license this image (57184243), contact WireImage.com

Frederick Breedon/WireImage.com

Katy Perry (R) sighting at midtown hotel on April 10, 2009 in New York City. Celebrity Sightings in New York - April 10, 2009 New York, NY United States April 10, 2009 Photo by Christopher Peterson/FilmMagic.com To license this image (57166468), contact FilmMagic.com

Christopher Peterson/BuzzFoto/FilmMagic.com

Katy Perry on her way to a show with friends in NYC. April 9, 2009 X17online.com exclusive

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Katy Perry on her way to a show with friends in NYC. April 9, 2009 X17online.com exclusive

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Katy Perry on her way to a show with friends in NYC. April 9, 2009 X17online.com exclusive

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Katy Perry on her way to a show with friends in NYC. April 9, 2009 X17online.com exclusive

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Katy Perry on her way to a show with friends in NYC. April 9, 2009 X17online.com exclusive

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Katy Perry (R) sighting at midtown hotel on April 10, 2009 in New York City. Celebrity Sightings in New York - April 10, 2009 New York, NY United States April 10, 2009 Photo by Christopher Peterson/FilmMagic.com To license this image (57166467), contact FilmMagic.com

Christopher Peterson/BuzzFoto/FilmMagic.com

Musical artist Katy Perry performs at Paper Magazine's The Beautiful People party at the Hiro Ballroom on April 9, 2009 in New York City. Paper Magazine's The Beautiful People Party 2009 Hiro Ballroom New York, NY United States April 9, 2009 Photo by Mark Von Holden/WireImage.com To license this image (57163527), contact WireImage.com

Mark Von Holden/WireImage.com

Musical artist Katy Perry performs at Paper Magazine's The Beautiful People party at the Hiro Ballroom on April 9, 2009 in New York City. Paper Magazine's The Beautiful People Party 2009 Hiro Ballroom New York, NY United States April 9, 2009 Photo by Mark Von Holden/WireImage.com To license this image (57163517), contact WireImage.com

Mark Von Holden/WireImage.com

Angelina Jolie walks the red carpet with her husband Brad Pitt at the 'Inglourious Basterds' Premiere during the Cannes Film Festival on May 20, 2009, showing an impossibly long leg. Every inch of it.

Dominique Charriau, WireImage

Spring is busting out all over. In related news, Salma Hayek looks beautiful in her Golden Globes attire... aaand we're resisting the urge to make a Golden Globes joke. The dress isn't conservative. The end.

Jason Merritt, Getty Images

When your figure is as lovely as Heidi Klum's, we suppose you can get away with sporting a little black dress involving so little actual dress.

Gabriela Maj, Getty Images

Actress Blake Lively attends the 2009 The CW Network UpFront at Madison Square Garden on May 21, 2009... in her jammies? This deep cut and super-short romper looks suspiciously like special occasion nightclothes.

Bryan Bedder, Getty Images

Sharon Stone arrives for the screening of 'Inglourious Basterds' at the Cannes Film Festival on May 20, 2009, with beautiful legs... and so much of them.

Valery Hache, AFP / Getty Images

We know, you're shocked to see Paris Hilton on this list. This dress is but one of many that flirts with obscene shortness. Her red carpet choices are not always what you'd call "modest."

Dan MacMedan, WireImage

Icelandic singer Bjork's swan dress at the 2001 Oscars was so insane, it actually distracted us from the fact that it's also REALLY short and bares her bra on one side.

Jerzy Dabrowski, Keystone Pictures

Anyone who wondered what Jennifer Lopez looks like naked must have been very satisfied by her famous plunging neckline and translucent skirted ensemble, which left almost nothing to the imagination.

Jeff Vespa, WireImage

Cher is famous for the zany costume she donned for the Oscars. It's not just wacky, though - she's showing an awful lot of skin.

Dominguez / Globe

We're not at liberty to show you Rose McGowan's red carpet get-up from the back, but please trust us when we say you can see everything. EVERYTHING.

Jeff Kravitz/FilmMagic

Jonas Brothers: In February, The Jonas Brothers told Details magazine they have vowed to abstain from sex until marriage. The guys wear purity rings as "promises to ourselves and to God that we'll stay pure till marriage," Joe said. The rings are just one of the ways of being different than everybody else out there, they said.

Scott Gries, Getty Images

Dita Von Teese: The oft-ogled burlesque dancer claims she abstained from sex for a year after her marriage to Marilyn Manson fell apart in 2007. "I didn't feel ready to have another partner," she says, although the healing powers of time have since done their magic. "Let's say I'm enjoying myself at the moment ... I have suddenly become quite lecherous and it's fun."

John Shearer, WireImage

Hilary Duff: Even though Elle Magazine reported in 2006 that Duff was still a virgin, the singer is now denying the comments. In the January 2009 issue of Maxim, Duff clears up the rumors. "I was quoted saying I was a virgin, but I absolutely did not say that. That's nobody's business but my own," she said.

Jeffrey Mayer, WireImage

Selena Gomez: The 16-year-old singer and dancer wears a purity ring to declare her stance on sex. "It's something I made a promise to myself, to my family and to God," she said. "People say, 'She's trying too hard.' It's so weird. I'm not trying to be anybody but myself," she said.

Kevin Winter, Getty Images

Taylor Swift: The country superstar has discussed her desire to stay a virgin until marriage in the past, and is using that same defense to shoot down pregnancy rumors. Responding to such rumors, Swift called it "the most IMPOSSIBLE thing on the planet. Take my word for it. Impossible."

Getty Images

Johnny Depp: Johnny played guitar in a rock band called The Flame and lost his virginity to a groupie at 13, in the band's van. This verifies that Johnny has always been a rock star.

Pascal Le Segretain, Getty Images

Daniel Radcliffe : In October's Details Magazine, Daniel confesses that he lost his virginity at age 16 -- and that the woman was older. The age difference "wasn't ridiculous," the 'Harry Potter' actor says. "But it would freak some people out."

Bruce Glikas, FilmMagic

Angelina Jolie: In an interview with Britain's OK! Magazine, Angelina says she lost her virginity at 14 to her first boyfriend. But when the sex "wasn't enough," she began cutting him with a knife.

George Pimentel, WireImage

Dakota Fanning: At 14, she has made a pledge with her mom to stay clean and abstinent until she's legal. Who knows what will ensue after she turns 18.

Carlo Allegri, AP

Britney Spears: Although Britney said she lost her virginity two years after dating Justin Timberlake, her mother sold out and revealed that Britney actually lost her virginity at 14 to a high school football star.

Steve Granitz, WireImage (2)

Angelina Jolie and Brad Pitt attend the 'Inglourious Basterds' premiere held at the Palais Des Festivals during the 62nd International Cannes Film Festival on May 20th, 2009.

Pascal Le Segretain, Getty Images

Angelina Jolie and Brad Pitt attend the 'Inglourious Basterds' premiere held at the Palais Des Festivals during the 62nd International Cannes Film Festival on May 20th, 2009.

Martin Bureau, AFP / Getty Images

Angelina Jolie and Brad Pitt attend the 'Inglourious Basterds' premiere held at the Palais Des Festivals during the 62nd International Cannes Film Festival on May 20th, 2009.

Pascal Le Segretain, Getty Images

Angelina Jolie and Brad Pitt attend the 'Inglourious Basterds' premiere held at the Palais Des Festivals during the 62nd International Cannes Film Festival on May 20th, 2009.

Francois Guillot, AFP / Getty Images