Colin Gets Electra-fied at the Playboy Mansion

TMZ's cameras were all over the place this past weekend doing what they do best: catching all the action going down in Tinseltown!

Our first stop was the AXELab party at the Playboy Mansion, which was filled to the brim with huge stars and scantily clad women; Colin Farrell, Nick Cannon and Carmen Electra all enjoyed Hef's place -- one of them was even seen hanging out in the legendary grotto -- but that's a secret for now.

Other celebs caught over the weekend: Black Eyed Peas, Paris Hilton, Shanna Moakler, party girl Lindsay Lohan, Greasy Bear Brandon Davis, comedian Chris Rock, "Girls Gone Wild" creator Joe Francis, Nicky Hilton, Chris Kattan, and Gwen Stefani -- who did a bit of shopping at Barney's with the family.