Brit Says, "Happy Father's Day, Daddy!"

Brit's in Vegas celebrate with her dad Jamie, at the same time Kevin's there to pick up his Father of the Year award at Prive!

A source tells People.com that's the reason for Brit's trip, but Brit's hotelier pal George Maloof, owner of the Palms Hotel & Casino, would probably like us to believe otherwise ... he says he wants Brit to perform at his Pearl Theater. He tells the mag the two didn't discuss it during their recent dinners together, but that he'd love it to happen.

The report also says Britney's schedule to record with Sean Garrett (who's produced for Beyonce, Chris Brown, Ciara, Usher, and others) in three weeks. A little playtime in Vegas before she's back to work!