Katy Perry's demos for her leftovers that other people have used are flawless
(Can't find a studio version on YouTube from mobile. Wtf.) Jessie James can sing her ass off though.
I think Jessie James did it better. It's a tie between Katy and Kelly because Kelly took away my favorite line.
Both stars change key lines Bullet: Katy: momma warned me about boys like you that's the reason I wear these steel toed boots. Jessie: momma warned me about boys like you that's the reason I wear these high heeled boots.
I Do Not Hook Up: Katy: keep your thing in your pants, heart on your sleeve Kelly: keep your hand in my hand heart on your sleeve.
Jessie wins the first set, but Katy beats Kelly's line