Music News John Mayer says he watched Katy Perry's live stream 11/28/2017 John Mayer says he watched former girlfriend Katy Perry's live stream event in June. Read More RELATED NEWS From Tokyo to Las Vegas: Taylor Swift's flight to Super Bowl LVIII'Chucky' Season 3 trailer released by USA Network and Syfy'Quantum Leap' Season 2 visits L.A. riots, Salem Witch Trials, and more TAGS: Katy Perry John Mayer