According to this article in the NYP.
KEVIN'S BAD RAP - New York Post Online Edition: Seven
No one is buying K-Fed tickets because his music sucks.
K-Fed said, "Fuck you bitches, anway. It was a joke. Yeah, the whole cd and concert was a joke. Yeah, America, you just got Punk'd! Popozao that, bitches!"
Ashton Kutcher's publcist said, "We have nothing to do with K-Fed and our lawyers will be talking to him about his misuse of a licensed trademark."