Sarah Chalke smiled for the cameras while stopping by The Late Show yesterday to meet David Letterman for the first time. The How I Met Your Mother and Scrubs star had Buzz laughing at the TCAs, and last night was no different — Sarah joked about having a round face and told a funny story about losing her engagement ring, while Dave shamelessly flirted. Sarah's quirky charm and attitude were endearing as usual, so it's no wonder she scored a spot on our 10 Most Underrated Actresses list.

To see the video of Sarah's interview and more photos, just read more

Christina Applegate looked bundled up while filming Samantha Who? in LA yesterday afternoon. The actress has been hard at work after this Summer's breast cancer diagnosis and elective double mastectomy, jumping right back into playing her quirky amnesiac alter ego. While you loved Christina's red carpet Emmy look, we'll be giving you the details on all of Samantha's cute outfits all season long on CelebStyle.

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Ed Westwick got touched up by his makeup artist between takes on the set of Gossip Girl in Brooklyn yesterday. Penn was also looking put together in his blazer, proving that the boys can have their own fun with fashion and makeup, though not as much as Blake and Leighton do. While we're not likely to hear Ed and Penn swapping beauty tips on the show, it's always fun to get a sneak peek at what keeps the guys looking so hot week after week.

To see more photos of Penn and Ed, just read more

Paris Hilton managed to amp up her tan between one night in London and the next, though she had to keep herself bundled on her way back to the hotel after a night out at the Kingly Club. It's only right that Paris makes sure she's well acquainted with the city since she's looking for her next BFF in the UK. Seeing how ridiculous things got on the second episode of Paris Hilton's My New BFF this week, I can only imagine what sorts of things she'll get up to filming overseas. Speaking of Paris being over the top, the guys at Funny or Die took her new video about running for fake president up a level by outlining the Paris Doctrine for her in Harper's Bazaar.

To see more of Paris around London just read more

• Taylor Momsen gets dramatic in Crash — JustJared
• A first look at Alyssa Milano's new show — BuzzSugar
• It's a Buffy reunion at the Eyegore Awards — Pink Is the New Blog
• Salma Hayek takes jokes in stride — MSN Hot Gossip
• Lauren Bacall is not a fan of Tom Cruise — D-Listed
• Mel B is back in her lingerie — Egotastic
• Carmen Electra celebrates her DVD — Hollywood Tuna
• How to dress like Gwyneth Paltrow — Lainey Gossip
• Tara Reid takes her man out — Hollywood Rag
• Brooke Hogan turns down Playboy — IDLYITW
• The Olsen twins refuse to grow up — cityrag
• The Project Runway finalists do Regis and Kelly — popbytes
• Ever wonder what Woody Allen's house looks like? — MollyGood
• "That's so gay" is so not cool with Duff — PopEater