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It’s a pop princess smackdown! Ke$ha unloaded on Britney Spears, calling her lip-syncing, well, ‘bulls***’!

Tell us what you really think, Ke$ha! The “TiK ToK” singer clearly doesn’t think much of Britney Spears, slamming Britney’s habit of lip-syncing during concerts. “I think that’s bulls***,” Ke$ha told the Scottish Daily Record. “I don’t think that’s fair at all for people who are going to see the show. I think if you are going to be a singer, you should sing. If you are going to be a dancer, you should dance.” Ouch.

And that’s not all she said. “It’s treating people as if they are too stupid to realize you are not actually singing. Sometimes it is hard to sing and dance at the same time but I would rather be off and be real and genuine about it to my fans. I don’t want to treat my fans like they are stupid.”

Who would you rather listen to?