American Idol judge Jennifer Lopez wore one of curve-hugging, see-through Giambattista Valli gown at the 2011 American Music Awards (AMAs) held at the Nokia Theatre L.A. Live in Los Angeles, California on Sunday (November 20)- more pictures below.

2011 AMAs: American Music Awards Winners (FULL List)

The 42 year-old singer took over the stage to deliver a steamy and raunchy performance of her latest hits, “Papi” and “On The Floor” featuring Pitbull, who also later performed with the singer’s ex-husband Marc Anthony. That was not awkward at all.

Jennifer, who is rumored to be dating a backup dancer named Casper Smart, won the award for Favorite Latin Artist.

Jennifer Lopez @ 2011 AMAs Red Carpet Pictures

[images: Adriana M. Barraza /wenn.com]