ADRIAN: LIFE OF THE PARTY

In what seemed like an episode of the hit HBO show, Entourage's third-season party (at a vacant Hollywood warehouse) starred ADRIAN GRENIER surrounded by a gaggle of guests. He extricated himself only to dance with an attractive young woman on some nearby stairs. The bash—which featured a Viking-themed photo booth and hand massages—was packed with costars JEREMY PIVEN and KEVIN CONNOLLY, show executive producer MARK WAHLBERG, MARY J. BLIGE, HAYLIE DUFF (who, despite previous canoodlings with Connolly, told Insider that she's single) and sis HILARY DUFF, who said, "We'd love to do anything on Entourage—it would be fun!"

K-FED'S DIVORCE SOIREE

Although the purpose of KEVIN FEDERLINE's April 3 "Divorce Party" at L.A. club Element was to celebrate his official singledom—he reached a settlement with ex-wife Britney Spears five days earlier—the aspiring rapper (pictured here April 6 in Las Vegas) showed little interest in the ladies throughout the night. Instead, he chatted with brother CHRIS and a group of guy pals at a table while guests watched scantily clad dancers perform onstage.

FAST TAKES

No doubt flashing her driver's license, AMANDA BYNES hit Manhattan club Marquee for her 21st-birthday party on April 6 (the actual day was April 3). "She was a total sweetheart," said an onlooker. "Very low-key."

Indulging the "little bit of bad witch" in her, DITA VON TEESE stripteased at Social Hollywood on April 5 at a bash julib.com threw for the musical Wicked. As for her split from Marilyn Manson, she says, "We aren't friends—but don't hate each other."

Twelve days after turning 32 on March 27, Black Eyed Peas's FERGIE enjoyed crab legs at a birthday dinner at Morton's The Steakhouse in Santa Ana, Calif., with beau Josh Duhamel and nine other guests.