After spending Tuesday with her two sons Preston, 2, and Jayden James, 1, Spears switched into pop-star mode, arriving at L.A. restaurant and nightclub Social Hollywood to shoot the video for her tabloid-bashing single "Piece of Me" – the second single off her album Blackout. (It's being directed by Wayne Isham, who helmed Spears's "I'm Not a Girl, Not Yet a Woman" video.)

Spears and her backup dancers donned identical blond bob wigs and black trench coats.

The premise? "The paparazzi are following [Britney], so they're dressed alike to trick them," a source close to Spears tells PEOPLE. "They all go into a club to get away. One [photographer] sneaks in, but Britney, in the end, discovers him."