Now I'm going to put on risk my own life...
I don't like "Till The World Ends" (song)
AT ALL! I mean, I hate it... It has to be my least favorite song of all time. It's so cheap, trashy and non-Britney.
I'm not saying I don't listen to it and enjoy it. I'm talking musically, I just don't feel it..

EDIT: I can't deny Britney made it a SMASH
legendary HIT comparing it to Ke$ha's version. Hers makes me sick.