The 23-year-old Tik Tok star revealed that a review of her album Cannibal left her reeling after questioning her vocal ability.
She told Seventeen magazine, 'I accidentally read a review, and it was really positive, but at the end it said, 'We don't really know if she has the best voice'. Which is bulls**t.
'That's the one thing I'm most confident about. I don't have the best body in the world, but I know for a fact that I have a really good voice.'
Ke$ha said she took the critique to mean that she still had a long way to go to prove herself.
She added, 'It really bummed me out that somebody didn't see that I have vocal talent, and then I got upset.'