Shake It

It's on Just Dance Kids. It's sung by Metro Station. Covered by The Just Dance Kids.

Dancers
The lead dancer is a boy with black vest, white shirt underneath, red bandana on his neck, black belt, black pants and black shoes.

The left and rigth dancer are girls, one with brown hair and the other with blond hair; they both wear white shirt, black tie, black suspenders, grey shorts, high grey socks and grey shoes.

Background
It looks like a stage with lots of audio speakers.