For her husband MARC ANTHONY's 38th birthday, JENNIFER LOPEZ led a love train across Las Vegas Sept. 16. First stop: Caesars Palace, where the couple jammed to JUAN GABRIEL in concert. Next: Tao at the Venetian, where 25 guests, including LEAH REMINI, gathered for an Asian-themed feast. After dinner, Lopez—who opted for dancing over drinking—treated her Coors Light-sipping husband to a group performance of the Jackson 5's "I Want You Back." The singer even led a conga line and kissed Anthony in full view of partygoers. "They were close the whole night," an observer tells Insider. Adds guest DJ SWIZZ BEATZ: "They're a natural match."
Sometimes SHAKIRA just can't stop singing. On Sept. 16, she and WYCLEF JEAN hit Miami's Suite for a post-concert party and a surprise performance. Going barefoot, the singer (above) belted out tunes until 1:30 a.m.
SHAR JACKSON, K-Fed's ex, is one devoted Chippendale fan. She caught their Male Revue at Vegas' Rio Hotel five times in one week—once with Kevin's mom, Collette Federline.
How will Big Brother 7: All-Stars winner MIKE "BOOGIE" MALIN spend his $500,000? On the Dolce Group, the restaurant biz he owns with ASHTON KUTCHER and WILMER VALDERRAMA, which is opening locations in Atlanta this fall. Says Malin (above): "I'd rather [not be] a flash in the Hollywood pan."