[Produced by Dr. Luke & Max Martin]
Dr. Luke and Max Martin (both of whom are critically acclaimed as “Songwriters of the Year” for Katy Perry songs in the past)
Many believe that the producers plagiarized the song, since the chords are almost identical to Sara Bareilles’s 2013 single, “Brave”; refer to a group of Twitter claims here. Both songs are written in the key of B♭ major, contain a similar plinky piano production, and share a moderate tempo of 88-92 beats per minute. Dr. Luke responded by tweeting this:
Nevertheless, Katy Perry and Sara Bareilles are great friends.
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