Michelle Williams and Heath Ledger Photo by: Isabella / Prahl / Splash News
Caught in the Act!| Drew Barrymore
Michelle Williams and Heath Ledger, wheeling 14-month-old daughter Matilda through their Brooklyn, N.Y., neighborhood while carrying their dry cleaning. (When it comes to errands, who needs assistants!)

Patrick Dempsey, lunching al fresco with a male pal at Italian eatery Pizzicotto in Brentwood, Calif. The Grey's Anatomy star, sporting a blue baseball cap, brown suede jacket and jeans, sipped 7-Up and feasted on a margherita pizza.

Mary-Kate and Ashley Olsen, holding court in a banquette at New York City club Butter. Mary-Kate jumped to her feet and started singing to U2's "Sunday Bloody Sunday" and Lynyrd Skynyrd's "Sweet Home Alabama," while a more sedate Ashley chatted with friends. All the while, the sisters' burly bodyguards stood by to make sure clubgoers didn't get too close to them.

Ashlee Simpson, shopping with her mom at L.A. grocery store Beverly Glen Marketplace. In her cart: Frosted Flakes and strawberries.

Marquee
Caught in the Act!| Drew Barrymore
Jamie Foxx, dancing nonstop at an afterparty at New York City club Marquee following his Madison Square Garden concert. The singer-actor made a grand entrance in a furry brown coat and aviator sunglasses, but by the end of the night had stripped down to a tight T-shirt and a nylon doo-rag. While sipping champagne, he bobbed his head to the beat of songs including 50 Cent's "Just a Little Bit" and sang along to his own hit "Gold Digger." Of course, he also was surrounded by ladies: At one point, Foxx – who employed his trademark move, pouring shots directly into their mouths – was sandwiched in an all-female dance train with two women grinding in front of him and one model-esque woman behind him. Also making the scene: American Idol star Fantasia Barrino.

• By LAURA HAHN, TIFFANY HOPKINS, LESLEY MESSER and DANIEL J. VARGAS

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