Jennifer Lopez left her trailer on the set of American Idol and took her seat at the judges' table last night to see this year's five finalists perform. Jennifer wore a formfitting red dress with a sexy mesh cutout and Christian Louboutin heels as she joined Randy Jackson and Steven Tyler on the stage. As this season of American Idol winds down, Jennifer's own music and movie career is heating up. She's starring opposite Cameron Diaz in What to Expect When You're Expecting, which hits theaters May 18, and in June, she's heading out on tour in South America with Enrique Iglesias in support of her album Love? Our latest I'm a Huge Fan winner, who will meet Jennifer Lopez in person in just a few short days, was on hand at last night's taping of Idol to chat up the contestants and get the inside scoop on what it's like to work with Jennifer. Catch today's PopSugar Rush to see the behind-the-scenes action from her visit to the set and stay tuned for the newest episode of I'm a Huge Fan, coming soon!