updated 09/18/2006 AT 01:00 AM EDT

originally published 09/18/2006 AT 01:00 AM EDT

Yes, he partied like a rock star. To celebrate his 28th birthday, CISCO ADLER played a set with his band Whitestarr on Sept. 2 at the Malibu Inn while girlfriend MISCHA BARTON looked on. Party guests included KID ROCK and JEREMY PIVEN (who doubled as bandmates). When they weren't rocking, the guys ruled the bar: Rock held hands with wife PAM ANDERSON, and Piven held court with a female entourage.

Are NICK LACHEY and VANESSA MINNILLO getting serious? For Labor Day weekend, he took her home to Cincinnati for family time with his brother Drew (and some waterfront R&R, left).... Stalwart singleton RENÉE ZELLWEGER walked hand-in-hand with a mystery man last week in Vancouver (where she's filming Case 39). Her rep had no comment.... ASHLEE SIMPSON wastes no time in L.O.V.E. Simpson—who just broke up with BRAXTON OLITA, her boyfriend of a year and the drummer in her band—was spotted with Fall Out Boy bassist PETE WENTZ at a Sept. 2 party in N.Y.C. "They were glued together, making out," says a partygoer. "Ashlee is single," says her rep. "She's not dating anyone."

On Sept. 1 REESE WITHERSPOON (above) kicked off Labor Day Weekend with a girls' night out in Vegas. Headline act? A Tim McGraw and Faith Hill concert at Mandalay Bay.

Filming Ocean's 13 works up an appetite: On Aug. 31 costars GEORGE CLOONEY and BRAD PITT ordered steaks, french fries and creamed spinach with fried egg at Wolfgang Puck's Cut at the Regent Beverly Wilshire.

HEATHER LOCKLEAR recently spent the night with country star TOBY KEITH (below)—in his "Crash Here Tonight" music video, anyway. "He's wanted her in one of his videos for a long time," says a Locklear pal. "She heard the song and loved it."

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