Everyone knows fans get obsessed with celebrities, but it's nice to know that celebrities get starstruck too.
"One of the first times I went to the Grammys, I got to share a dressing room with Miley Cyrus and Taylor Swift," she said. "I asked them for a lock of their hair from each one of them, which is totally creepy, but awesome."
And that's not all. The "Firework" singer said she put little bows on the two locks of hair and put them in her purse.
" That was my little secret and I'm a freak!" she said.
Perry, 28, has been revealing quite a bit about herself lately, as she promotes her new album, Prism. Recently, she opened up about her divorce from actor Russell Brand.
"I'm not the kind of person that is always, like, 'What doesn't kill you makes you stronger,'" she said. "I was pretty f*****, yes. It hurt a lot. I got a good knock."
However, she said that now, she has a new way of dealing with men.
"My self-worth was in someone else's hands, which is never a good idea, because it can be taken from you at any time," she said. "And it was, and it was shattered. But I don't do that anymore."