Katy Perry: Surprise Performer at John Mayer's Brooklyn Concert!

Katy Perry dons a beautiful patterned dress while performing with boyfriend John Mayer held at Barclays Center on Tuesday (December 17) in New York City. The 29-year-old singer made a surprise appearance to sing “Who You Love,” which is the couple’s new single. Check the video below! PHOTOS: Check out the latest pics of Katy… Read More »