The 28-year-old showed off her injuries during an appearance on US programme 'The Tonight Show with Jay Leno'and admitted she has no intention of going under the knife to remove the stones from beneath her skin - because she's grown to love them.
"Growing up in Santa Barbara I did a lot of surfing and skating and wherever I go I still have these two rocks that I still can't get out of my knees from being slashed across the rocks in Rincon, which is like a really popular spot in Santa Barbara, and the rip tides just slapped me against the rocks and forever I've had these rocks in my knees. I kind of like it, I feel, like, closer to earth," Perry said.