We all know that Perry loves to play around with her hair, but what we didn't know (and didn't really want to know) is that the singer has made a hobby of collecting other celebrities' hair. In fact, she talked about it openly during a fan Q&A, even admitting that she used to keep Miley Cyrus and Taylor Swift's locks in her bag. "It is totally creepy, but awesome," she said. We agree that it is creepy.