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While Patrick Dempsey was busy promoting Transformers 3 on The Late Show With David Letterman last night, Letterman couldn't resist changing the subject to Grey's Anatomy. He asked Dempsey to address the rumors that he's done with the show, to which Dempsey reiterated that his contract is simply up after next season and could definitely be renewed. He also tells Letterman that he shouldn't be that worried about a Seattle Grace without McDreamy, but I think we'd all feel a lot better if ABC made it official. Watch!

Justin Timberlake stopped by The Tonight Show with Jay Leno last night to chat about his two upcoming movies Bad Teacher and Friends With Benefits. Justin recently celebrated his 30th birthday, and he revealed that he's ready to take a break from working to just enjoy life for a bit. Inspired by a trip to visit his dad for Father's Day, Justin says that outside of promoting his projects, which also include futuristic thriller Now, he doesn't have any more movies lined up. Can you really see Justin taking a break to slow down?

Tom Hanks really wants you to see Larry Crowne. How do we know this, you ask? He was willing to happily dance his way through a weather segment during an appearance on the Univision show Despierta América. We're not talking about a quick two-step either. Watch as Hanks relentlessly shimmies and shakes his way through the report for a solid two minutes. Love him.

One of the hottest exercise trends (literally) is Bikram Yoga. On The Late Show with David Letterman, Jason Bateman tells the story of actually working with Bikram himself when he was a kid growing up in Los Angeles. The memory isn't exactly a happy one for Jason, but in classic Jason Bateman fashion he retells the story of being in Bikram's class, and he brings along a picture of him with Bikram to prove that he was there.

The Miss USA pageant continued its tradition of testing pageant queens with politically charged questions. We all remember 2009, when Miss California Carrie Prejean was forced into the public consciousness after she said she was pro "opposite marriage" and against same-sex marriage. Last night, it was reigning Miss California Alyssa Campanella's turn to face the heat. Real Housewife Caroline Manzo asked the self-proclaimed lifelong Star Wars fan and non-natural redhead if she believes in legalized marijuana. Alyssa stumbled on her words a bit, throwing out mentions to the economy and the drug wars, while making sure to flash a bright smile. But we got her message — she's pro medical marijuana — and it was enough to secure her the title of Miss USA. Watch her answer now.

Katy Perry may have the party anthem of the Summer in "Last Friday Night (T.G.I.F.)," her latest single from Teenage Dream. If the catchy tune doesn't make you happy, then the video will. In the '80s movie homage, she gets into character as Kathy Beth Terry, a glasses-and-braces-clad nerd who wakes up with the fuzzy memories of an epic party the night before. The real highlights of the clip are the star cameos, which include Glee stars Darren Criss and Kevin McHale and viral video sensation Rebecca Black. Those are only a few of the celebrity sightings though, so watch the video to catch the rest!

Harry Potter can hoof it! Daniel Radcliffe may not have gotten a Tony nomination this year, but he still stole the show with a number from the musical he's currently starring in, How to Succeed in Business Without Really Trying. Watch him sing and dance to "Brotherhood of Man" with the rest of the cast at the award show on Sunday.

Jennifer Lawrence stopped by Live With Regis and Kelly this morning, showing off her long brown locks, which she recently dyed for The Hunger Games. Talk didn't turn to her role playing Katniss Everdeen in the highly anticipated movie adaptation, though she did reveal the story about how she was first discovered. It certainly seems to be working out well for her so far. Check out Jennifer's Kentucky pride and the start of her quick rise to fame.

Peter Sarsgaard, star of the upcoming Green Lantern, is happily married to actress Maggie Gyllenhaal, but as the actor explained to Conan, love didn't always come easily to him. Last night, Peter told his tale of heartbreak. Back in his college days, he discovered on Valentine's Day that his childhood sweetheart had left him for a North Carolina Tar Heel basketball player. As he recounts each precise detail about the demise of his first love, it becomes obvious that this experience left a mark on him. Fortunately, he was able to get over the initial rejection by going to a Tears for Fears concert.

Lauren Conrad looked adorable in a dress from her Paper Crown holiday collection when she stopped by to chat with Chelsea Handler on last night's Chelsea Lately. The former star of The Hills joked about why her new reality show didn't cut it for MTV, and Chelsea made a dig at some of her fellow E! stars. Check it out!