Katy Perry Talks Rumored Taylor Swift Beef, John Mayer Relationship, Childhood, Lenny
 

With the Super Bowl just days away, Katy Perry graces the cover of Billboard magazine ahead of her halftime performance. When she takes the stage at the University of Phoenix stadium on Sunday, she will perform for 12-and-a-half minutes for an audience of about 100 million TV viewers and 63,400 attendees. The cover story follows Perry through rehearsals, where she dishes on her childhood, her home life, her relationship with John Mayer, her rumored beef with Taylor Swift, and her thoughts on all things Super Bowl XLIX-related, among other topics. Here's what we learned:

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