Sightings: Chloe, Charlize and Ellen Pompeo

Sevigny buys flowers. Which other celebs have we spotted out and about?

GARDEN VARIETY: Chloë Sevigny, carrying a Donna Karan Modern Leo Tote bag while picking up flowers at a grocery store in L.A.

BAND OF BROTHERS: Madonna and Guy Ritchie's sons, Rocco and David, bowling at Bowlmor Lanes in Union Square in NYC. (No, they weren't alone! A nanny and bodyguard were in tow.)

WATER WORKS: Colin Farrell, hanging poolside at the Hollywood Roosevelt Hotel.

GREY GROUP: T.R. Knight, Katherine Heigl and Ellen Pompeo, eating cupcakes and laughing during marketing impresarios Mike McGuiness and Kari Feinstein's birthday party at Simon L.A.

BELLY UP: Seinfeld star Jason Alexander, enjoying mac 'n' cheese, spicy tuna rolls, mini lobster tacos, Caesar salad and a petite filet at Fix Restaurant & Bar in Las Vegas.

SCREEN GEM: Christian Slater, going to the movies at the Grove mall in Los Angeles.

FISHY BUSINESS: Ben Affleck and Don Cheadle, having dinner with poker champ Annie Duke at Sushi Roku in Las Vegas' Forum Shops.

WALK THIS WAY: Charlize Theron and boyfriend Stuart Townsend, taking an afternoon hike at Runyon Canyon in L.A.

TOOL TIME: Lost lovebirds Dominic Monaghan and Evangeline Lilly, shopping at Koontz Hardware in West Hollywood.