Britney Spears, working on her upcoming album at the Record Plant Recording Studio in Hollywood. "She was rehearsing material, working hard and having fun all at the same time," an insider tells us.
Ashlee Simpson, partying with two female friends at Hollywood lounge Les Deux. Earlier in the evening, she grabbed dinner with sister Jessica at Los Angeles eatery Koi.
Rachel McAdams, flipping through a Premiere magazine in front of the newsstand inside Hollywood's Chateau Marmont hotel. And in the hotel's lounge, her Wedding Crashers costar Isla Fisher (who's Golden Globe winner Sacha Baron Cohen's fiancée) caught up with a female pal over coffee.
Jennifer Garner, having a mini Alias reunion with former costars Michael Vartan and Victor Garber at L.A. restaurant Orso. The trio shared a pizza topped with eggplant, sun-dried tomatoes, spinach and provolone. "They were having a terrific time, laughing loudly," says a patron.
See Wednesday's Caught in the Act >