Katy Perry is on the latest cover of Billboard, but it's the interview inside that may have many of her fans getting to know her even better.

Perry discussed the time she was late for an interview with Barbara Walters and how she was reprimanded by Walters. Perry, who was playing Madison Square Garden later that evening, said she never should have done the interview.

Perry also discussed her suicidal thoughts and her relationship with boyfriend John Mayer. Click here to read the interview.