Bad Romance by miles! I'm not even a fan of Gaga, but that song is a classic. And even more of a classic when compared to Into You. That song doens't even deserve to be mentioned in the same sentence as Bad Romance.
OT: into you is the good one. bad romance is SO overrated and it aged really badly (which is something gaga suffers from in general).
My Nostalgia wants me to say Bad Romance, so I voted that. But Into You's pretty good though. Both songs have their flaws but are pretty great overall.
