Jessica Supports Troops

Jessica Simpson has told People she is going to be Ashlee Simpson's made of honor.

"Of course," the 27-year-old told PEOPLE when asked if she'll be standing next to Ashlee on her big day."

Jessica was performing at the "America: United in Support of Our Troops Concert," Thursday May. 8, 2008 at Camp Pendleton Marine Corps Base, California. The free concert was only open for troops. Here are pictures of Jessica having fun with Dusty Hill from the band ZZ at rehearsals for the gig.