Best on-screen underwear moments?

In case you missed it, Emma Watson completely ditched her good girl image by stripping down to her bra and panties in 'The Perks of Being a Wallflower.' The coming-of-age story, including this racy scene, was part of a limited-theater release. Stephen Chbosky's film is now being released on DVD.

Not only did Watson strip down for her role in 'The Perks of Being a Wallflower,' she even got groped by co-star Logan Lerman. The film took home the Peoples' Choice Award for Favorite Dramatic Movie.

It's many people's worst nightmare: Being in their underwear in front of millions of people. But what about if you get paid for it? While many actors have clauses protecting their body parts from being exploited on the big and small screens, they are often seen waltzing around in their underwear because, hey, that's not so bad, right? Check out the best on-screen underwear moments ... Gwyneth Paltrow has never looked better. The 40-year-old actress is stripping down for her latest movie 'Thanks for Sharing.' Paltrow, who was recently named 'World's Most Beautiful Woman' by People magazine, proves she certainly deserves the title as she struts her stuff in racy black lingerie for the film's eye-popping trailer. In the movie, due out in September, Paltrow stars opposite Mark Ruffalo, who she starts to date only to later discover he's a recovering sex addict.

'The Office' star Jenna Fischer ditched her good-girl image by donning a sexy corset in the 2007 Will Ferrell comedy, 'Blades of Glory.'

In the 2006 comedy 'John Tucker Must Die,' innocent new girl Kate, played by Brittany Snow, strips down to her sexy red skivvies to give popular basketball star - and shameless womanizer - John Tucker (Jesse Metcalfe) a taste of his own medicine.

Demi Moore showed of her unmentionables in 2003's 'Charlie's Angels: Full Throttle.'

Avril Lavigne has officially said 'Goodbye' to her Sk8r punk vibe and hello to a more adult, sexy look. The 27-year-old singer released her new music video on March 1 to her fans as a thank-you for 'taking the time to listen to it, to buy my songs, to come out to the shows.' And what a thank-you it is. The mostly black-and-white video for her soulful ballad "Goodbye" is four minutes and 40 seconds of Lavigne, in a blond wig, stripping down into skimpy lingerie in a hotel room.

How do you make it in America? Strip, of course! Lake Bell parades around in her undies for a very sexy episode of HBO's 'How to Make It in America.'

Beyonce certainly knows a thing or two when it comes to getting the best revenge. The sultry singer shows an ex-boyfriend what he's missing as she struts around her bridal suite wearing nothing but white, lace lingerie and a look of satisfaction in the music video for her new single, 'Best Thing I Never Had.'

Then-newly single Justin Timberlake had no problem stripping down to his skiives with co-star Mila Kunis for their upcoming romantic-comedy, 'Friends With Benefits.' Not only does the audience get to watch these two sort out their complicated relationship on screen, it's done nearly in the nude.

Anna Paquin takes it off in a sizzling 'True Blood' scene.

While Daniel Radcliffe has stripped down his birthday suit on stage before, he was in for a whole new experience on the set of 'Harry Potter and the Deathly Hallows.' One scene had the actor donning a little white bra, as he was playing Hermione Granger disguised as the chosen one to trick the Dark Lord.

In a rare bloodless scene from 'American Psycho,' Christian Bale went through his daily beauty routine (note the ice pack to keep his face from puffing up), which involved underwear-clad crunches to keep his abs firm enough to handle all that one-handed chainsaw action.

As Nuke LaLoosh in 'Bull Durham,' Tim Robbins did everything he could to learn how to pitch for the Major Leagues -- that included removing his gear and performing some mild bondage with the wife of his veteran coach. The character was reportedly based on real life baller Steve Dalkowski.

Though Johnny Cash is not known for running around in his underwear, the film spoofing his life, 'Walk Hard: The Dewey Cox Story,' did remain true to reality in its depiction of the singer's substance abuse problems, which lead to to his alter ego running through the streets in his undies.

This is not how you get a girl to marry you. In 'Wedding Daze,' Jason Biggs dressed up in a Cupid's costume to propose to his girlfriend. Unfortunately, it didn't quit work out as he planned -- his girlfriend died from the shock. But we can't say we blame her.

Courtney Cox stripped down for a super-sexy episode of 'Cougar Town.'

Before she was famous, Charlize Theron climbed Hollywood ladder in not much more than a little white negligee. In '2 Days in the Valley,' she played a hitman's Norwegian girlfriend. The underwear-clad blond bombshell was appropriately named Helga.

In 'So I Married an Axe Murderer,' Mike Myers played an underwear-friendly beatnik musician who was afraid of commitment. Unfortunately, the one woman for whom he put aside his anxieties turned out to have a dark past. But before he discovered it, he spent a large amount of time making her laugh while in his underwear.

Jumby wants to be born now. Apparently, Jumby also wanted its momma to be in underwear all day long. In 'The Unborn,' Odette Yustman played a co-ed who discovered she had a stillborn twin, who her parents nicknamed Jumby. Turned our that baby was not too pleased with dying and repeatedly told his sister that 'Jumby wants to be born.' Following numerous underwear-clad scenes involving his sister, Jumby got his wish with the help of his sibling's boyfriend.

Jessica Biel logged in some serious time in her underwear during 2007's 'I Know Pronounce You Chuck and Larry.'

Sienna Miller turned up the heat with a lacy bra and garter belt in 'Layer Cake.'

Tom Cruise boogied in his boxers for 1983's 'Risky Business.

Marilyn Monroe's panty peek-a-boo in 1955's 'The Seven-Year Itch' became legendary.

She's not that innocent! Despite her near-nudity, Britney Spears' 2002 flick 'Crossroads' was a big flop.

Christina Applegate and Cameron Diaz flashed some skin in 'The Sweetest Thing.'

In the 2007 flick 'Black Snake Moan,' Christina Ricci endured being attached to a 30-40 foot long chain in her underwear. Talk about dedication to a role!

Sigourney Weaver's underpants made an appearance in 1979's 'Alien.'