Jessica Simpson hasn’t just joined John Mayer on his tour bus for those always fun cross-country journeys - she’s been spotted enjoying the concerts too.

She was spotted at the side of the stage at John’s gig at the Bank United Center at the University of Miami on Friday night.

A concert goer spotted Jessica taking photos of friend/stylist Ken Paves at the side of the stage and of John while he performed on-stage. The observer told People magazine: “She was rocking out the whole time. 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.”

“She was dancing like she was a real fan, and a lot of the crowd had their eyes on her the whole time.”