Jennifer Lopez fell on her butt during a boxing-theme performance of her new single Louboutins, at the American Music Awards 2009.

Lopez' featured a boxing ring on stage. The singer and her dancers dressed as boxers for her comeback performance after a break following the birth of her twins with husband Marc Anthony.

At some point of the choreography, Lopez's dancers bent their backs making a set of steps so the singer could step on them. A dancer was holding Lopez's hand as she climbed the backs but when she reached the last one, she jumped to the floor and landed on her butt.

The fall was slightly diminished by the lights and Lopez stood up immediately for a solo dance.

Watch J.Lo performing at the American Music Awards below: