Spears' sons fan of singing, dancing

Pop star Britney Spears' sons have been learning how to sing and dance by watching her rehearse.

The "Perfume" singer is preparing for the start of her two-year residency in Las Vegas Dec 27 and says sons Sean Preston, eight, and Jayden James, seven, have picked up plenty from her rehearsals.

"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," eonline.com quoted Spears as saying.

Spears said one of the things that motivates her during rehearsals is when she spots one of her sons in the crowd.

"I love when they're there. Last night, Preston was there and he lit me up when I saw him in the audience," she said.