Credit: WENN

Britney Spears delivered hit after hit before a sold-out crowd that included Kim Kardashian, superfan Nicole Richie and Paris Hilton at the Staples Center Monday night during her Femme Fatale tour, sponsored by her Radiance fragrance. Kardashian brought little sisters Kendall and Kylie Jenner to the show, while Hilton took photos and danced along with sister Nicky and mom Kathy. Also in the audience: Spears’s sons Preston and Jayden, who wore protective ear muffs and took turns sitting on her boyfriend Jason Trawick‘s lap in the front row.