Credit: Lester Cohen/WireImage.com; WENN.com

Oops.

Jennifer Lopez took a tumble during a high-energy performance of her latest single "Louboutins" at the American Music Awards in Los Angeles Sunday.

The slip-up happened after she climbed up on a human pyramid of semi-naked male dancers. After jumping off a dancer's back, she lost her balance and landed on her derriere.

Despite the stumble, the singer, 40, still kept her poise as the audience - including husband Marc Anthony - cheered on.

Black Eyed Peas will.i.am was impressed how she kept the show going.

"That shows she's a true entertainer and devoted," he told Usmagazine.com. "She came out of it and still rocked it. It doesn't matter how you fall - just how you get up. She got up."