I'm a fan of Animal and Cannibal, but not Warrior. Honestly, the songs on Warrior sound like they could have been remastered Animal outtakes to me. It sounds a bit more fresh than Animal, but never goes anywhere. At least Animal was upfront about what exactly it was and didn't pretend to be something new and groundbreaking.
Teenage Dream does exactly what it aimed to do, easy radio music.
Read the New York Times article on Warrior, and what Ke$ha + Luke have to say about it. You'll understand it a whole lot more.