"They were on John's tour bus hanging out most of the time before the show," E! Online quoted Kristi Chuckel, publicist for Summerfest, as saying. The actress was spotted in the wings enjoying Mayer's 2 hour performance. "She was backstage standing in the wings, hanging out and watching the show," Chuckel said.
A Mayer fan who saw Aniston backstage, said: "She seemed pretty into it. She supports him greatly, you can tell.
"John Mayer also seems to be playing with a lot more passion. I saw him last year at Summerfest, and he was very passionate then, but now something seems a little different about him," the fan added.