SPEARS SHOWS UP 12 HOURS LATE TO VIDEO SHOOT

Britney Spears upset dancers and the crew on the set of her "Piece of Me" video by showing up 12 hours late to the shoot Tuesday at L.A. restaurant and nightclub Social Hollywood.

Despite an 8 a.m. call time, Spears, 25, didn't leave her Beverly Hills home until after 7 p.m. after Kevin Federline's bodyguards picked up sons Sean Preston, 2, and Jayden James, 14 months.