Caught in the Act!

• With girlfriend Ashley Greene in Vancouver filming Breaking Dawn, Joe Jonas enjoyed a guys' night out at Trousdale in L.A. Huddled around a table in the back room, the musician was having a blast, cracking jokes with his group of pals, which included Evan Ross. Also there: Glee's Mark Salling, who was seated at a nearby table.

• Jennifer Hudson, showing off pictures of her son David on her iPhone to guests at designer Michael Kors's 30th anniversary dinner party in Paris. Partygoers also enjoyed a performance by Mary J. Blige, (who sang in French!) as well as shrimp cocktail, filet, chocolate cake with vanilla ice cream and wild strawberries.

• Days before her court date, Lindsay Lohan had a laid-back lunch at Katsuya Brentwood with sister Ali. The pair sipped water and ordered some of the restaurant's favorite dishes, including edamame, crispy tuna and baked crab hand rolls.

• Did she work up an appetite? Rumer Willis, dressed casually in a Market T-shirt, headed out to lunch with a pal at Urth Caffe in West Hollywood – then enjoyed a walk in Runyon Canyon with Ashton Kutcher and their dogs. At lunch, the starlet was in "chipper spirits," an onlooker says.

• Charlize Theron was treated to dinner by a male friend at West Hollywood's Chateau Marmont. The actress was sipping on sparkling water during the meal while sharing light conversation and letting out the occasional laugh. After her pal picked up the check, the two took off right before Scarlett Johansson arrived for her intimate dinner with Sean Penn.