Concertgoers in Mountain View, Calif., got an earful of Mayer's infidelities last night during a stop on the singer's national tour, where he admitted that Aniston caught him cheating in his sleep.
"He was talking about 'dream cheating,'" an eyewitness tells E! News. "He apparently made out with some chick in his dreams."
And what price did Mayer have to pay to his famous squeeze?
"He had to do his penance to his girlfriend by singing 'Dreaming with a Broken Heart,'" the onlooker tells us.
While Aniston was not in tow as far as audiences saw, perhaps Mayer's punishment was a little hairier than singing one of his own tunes. We wonder if Jen had anything to do with John's new military-style buzz hairdo? Hmmm.
Mayer's always been one of our favorite celebs because he reveals so much of himself. But has he now revealed too much of his scalp? Give us your two cents in the comments section below.