Katy Perry refuses to talk about ex-John Mayer to avoid 'getting bit in the ass'

Katy Perry has recently refused to talk about her former fiance John Mayer, as it always "comes to bite her in the a**".

During the interview for her new Rolling Stone cover, the 29-year-old singer revealed that she doesn't want to be rude to the 'Your Body is a Wonderland' singer anymore, ABC News reported.

The 'Roar' singer broke up with the 36-year-old musician recently after dating since last summer.