John Mayer gave one fan the surprise of her life when he bought her a guitar.

Julie Fermin, 16, was admiring an expensive guitar at a music shop in New York City's SoHo neighborhood, when Mayer popped into shop with girlfriend Katy Perry on Friday, July 5.

Fermin and her friends approached the celebrity couple and asked to take a picture (above). The group then chatted a little about music, with Fermin revealing she's been playing guitar since she was 11.

At one point, Mayer asked Fermin which instrument she liked in the store. "I showed him, and he went over and checked the guitar's price," she told Us Weekly. "I said, 'Yup, but I can't afford it,' and he said, 'Oh, stop it!'"

Fermin thought her celebrity encounter was over when Mayer and Perry left the store.

However, a store employee approached them with a surprise. "Well, you should get more excited, because John Mayer just bought you that guitar!" he told her.

"I never in my life thought I'd meet and get to talk to Katy Perry and John Mayer," Fermin tweeted later. "I literally thought it was impossible. FOREVER MIND BLOWN."

Tags
John Mayer, Katy Perry