While Lindsay Lohan searches for a new acting project to regain her credibility, it doesn’t hurt to schmooze with more successful female moguls like Queen Latifah.

Lohan and girlfriend Samantha Ronson showed up to celebrate Latifah’s 39th birthday Saturday night, at a Cover Girl Queen Collection bash at Hollywood’s Club Light.

“Lindsay and Sam came on the late side,” a source tells Celebuzz, “they hung out by the DJ booth [Sam did not spin].”

“They looked happy, joking with one another.”

Another couple unafraid to express their happiness? Paris Hilton and Doug Reinhardt. The pair snuggled on the dance floor while Hilton took photos of Latifah blowing out her candles and performing for the crowd including Harvey Weinstein, Kim Kardashian, Lil Kim, Missy Elliot, Monique Lhuillier, Patricia Field, Quincy Jones and Amanda Bynes.

E!‘s Marc Malkin has video of the Queen blowing out her three-tiered cake:

Latifah performed several tracks from her new album Persona, joined onstage by Elliot, Lil Kim and MC Lyte.

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