Ke$ha has apologized to rocker pal Andrew W.K. after her attempt to tattoo him resulted in an infection.
The pop star recently invited Ke$ha to try out her skin art skills on him, but he was left requiring medical attention when the ink effort turned bad.
He told Spinner.com, "It got infected. It's an unfortunate aftermath and my body ended up rejecting the ink and I had to go to the doctor. But it actually left a nice scar which was, in fact, cooler than the tattoo that's in the exact shape of the tattoo."
Now Ke$ha has offered up an apology of sorts on Twitter - although she insists it wasn't her fault.
Addressing the tattoo mishap in a tweet on Wednesday, she writes, "Not my fault. His safety pin. His pen. But at least it looks cool. Party. (Animalsss (fans), don't try this at home...sorry @andrewwk!)"