Gwyneth Paltrow
Gwyneth Steps Out with a Mystery Package in L.A. | Gwyneth Paltrow
Gwyneth Paltrow, breezing by in a pair of capris, flip-flops and toting a mystery package after visiting the Pacific Design Center in West Hollywood.

• A casual Kelly Clarkson, dining with nine friends at Josie's East in New York. Sporting a black hoodie and jeans, the American Idol champ chomped on turkey meatloaf. And next on her plate: new album My December, out July 24.

Lily Allen, celebrating her clothing line, Lily Loves, for New Look with a carnival-themed party at the chain's flagship store on London's Oxford Street. The spirited singer swilled mojitos and watched as fashionistas grabbed her dresses off the rack. As a bonus, she performed four songs – including "Smile" and "LDN" – for a crowd that included her father and younger brother. And in the spirit of healthy competition, she yelled, "It's better than that Topshop stuff!"

• That "Topshop stuff" comment, of course, was aimed at Kate Moss, who launched her line in the States at Barneys New York the same day, followed by a rooftop celebration at the Gramercy Park Hotel. At the bash, the model reunited with pal Naomi Campbell, giving her a hug. The two spent a long time chatting, an onlooker tells us, and Moss perched on the arm of Campbell's chair. Also making the scene: "Rehab" singer Amy Winehouse, sipping Sagatiba cachaca pomegranate mojitos. Mary-Kate Olsen, sat in the corner with beau Max Snow, while Kate Bosworth hung close to her sweetheart, James Rousseau.

Star Lounge Photo by: Courtesy Syndicate
Caught in the Act!| Gwyneth Paltrow
Josh Hartnett, channeling his inner rock star during karaoke night at New York's Star Lounge. While the reviews of his performance aren't in, the actor did belt out Emery's "Playing with Fire" and stuck by pal Zach Braff, enjoying his guys' night out. Earlier in the evening, however, Helena Christensen kept them company at the club.

• By MONIQUE JESSEN, LESLEY MESSER, EVAN SCHAPIRO

Wednesday's Caught in the Act >