Pop star Britney Spears' sons have been learning how to sing and dance by watching her rehearse for her upcoming Las Vegas residency. The 32-year-old 'Perfume' singer is preparing for the start of her two-year residency in Las Vegas on December 27 and says sons Sean Preston,eight,and Jayden James,seven,have picked up plenty from her rehearsals,reported E! online. "Preston,he's already dancing up a storm. He shows all my dancers how he can dance. It's really funny. Jayden is actually the singer. He sings a lot," Spears said. The star has been in intensive training for the shows and subjected to a gruelling rehearsal schedule,but is pleased with how things are looking ahead of the grand unveiling. "I've been through the wringer. But it's coming together and it's going to be worth it. I really feel that this is my best show I've ever done," she said.
