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Caught in the Act!

Originally posted Thursday February 22, 2007 05:25 PM EST

Mischa Barton Photo by: BEN-ZFI / bauer-griffin

• Mischa Barton, playing with her Pomeranian-Shih Tzu mix pup Ziggy at an L.A. dog park. Later, the newly single actress checked out a comedy show with friends at The Laugh Factory in West Hollywood and also headed over to Winston's lounge, where she danced to UB40's "Cherry Oh Baby" and "Betcha She Don't Love You" by 80s disco queen Evelyn "Champagne" King.

• Jennifer Aniston, dining with pals Courteney Cox and David Arquette at Il Sole in West Hollywood. After being greeted by the owner, the chef and other staff, the trio enjoyed their meal of sashimi-grade ahi tuna seared with herbs along with artichoke and arugula salad on the patio – where Aniston smoked and Cox checked her Treo-like device.

• Best Supporting Actor Oscar nominee Djimon Hounsou, waiting about 30 minutes for a table at Beverly Hills eatery Mr. Chow. (Hey, who says getting a nod from the Academy guarantees you a seat?) But the Blood Diamond star made the most of his time and even posed for a photo with a fan. The actor recently got the rumor mill churning when he shared a friendly night out at L.A.'s Hyde Lounge with Cameron Diaz.

Soho House Photo by: Kevin Winter / Getty

• Lindsay Lohan, "clowning around" with pal Steve-O at Teddy's at the Hollywood Roosevelt Hotel. "She was having a fun time, goofing off with him," says a fellow reveler. Also making the scene: Kirsten Dunst and Drew Barrymore ex Fabrizio Moretti, who "sat really close together, faces touching, hands holding, whispering all night," says a source.

• Demi Moore and Ashton Kutcher, walking in hand-in-hand to L.A.'s Soho House outpost, a private space set up for Oscars week (it's a West Coast version of New York City's members-only club). The couple enjoyed a drink before settling down to have dinner with friend Penélope Cruz and a group of executives in the venue's main dining room. (The trio then attended the GM Ten fashion show.) Drew Barrymore ate at a table nearby while Kylie Minogue ex Olivier Martinez sat with Rosario Dawson and a group of pals. Jude Law arrived for a late dinner at 9:30 p.m.

• By CECILIA DELAPAZ, REBECCA GROSS, LISA INGRASSIA and BRENDA RODRIGUEZ

Caught in the Act: Las Vegas Edition! >