Katy Perry and John Mayer at the Grammy Awards | 2013 Katy Shares Fun Grammys Moments With John — and Ellen! February 10, 2013 Share This link Katy Perry and John Mayer at the Grammy Awards | 2013 Source: Getty 8 / 14 by Allie Merriam 0 Save 0 Favorite 0 More Photos Previous 8 / 14 Next by Allie Merriam 0 What’s Your Reaction? 0 0 0 0 0 0 More Photos ‹ Back to Homepage Save 0 Favorite 0 Follow POPSUGAR Celebrity Pinterest Twitter Google + Instagram Featured Partners Jordan Graham Trial: Did Her Wedding Blues Lead to Murder? 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