Jessica Simpson Rocks Out Hard at John Mayer Show

Jessica Simpson and her new loser man continued to share quality time together Friday at his concert at the University of Miami.

Simpson was dancing to John Mayer's entire set and 20-minute encore, sources tell People, apparently enjoying his music for unknown reasons.

"She was rocking out the whole time," says one fellow concert goer. "She only seemed to know the words to his older songs though, because she sang along to 'Your Body is a Wonderland' and his older hits."

Mayer probably dedicated that one to Jessica. After all, it's the only thing she has going for her, if you know what we're saying. We're saying she's a moron with no acting or singing talent - which apparently runs in the family.

With a camera in hand, Simpson â€" who took in the show from the sound and lighting area alongside stylist Ken Paves, Billy Joel and his wife, Katie Lee Joel â€" snapped photos of herself and Paves, Mayer and the crowd.

"She was dancing like she was a real fan, and a lot of the crowd had their eyes on her the whole time," says the observer, who did not say that Jessica was wasted.

Tara Conner was reportedly there, but seemed distracted trying to flag down a beer vendor. Just kidding. There are no beer vendors at that venue.

Simpson and Mayer are longtime friends who've been linked off and on since the summer, when he started dating her just for the sex sparks started flying between the two.

They spent a lot of time heating up Miami last week, working out and dining together last Monday, then spending Tuesday heading toward his concert in Jacksonville.

This Monday, after an Orlando gig on Saturday, Mayer is due to perform once again in Pensacola. He'll also be doing a concert there. Har har. The Hollywood Gossip will have a full report and vomit in its collective mouth again soon.