1. Pride or Pride?
2. Superman or Superman, as well as (to loosen the definitions a bit) Superman or Superman?
3. Somebody that I used to know, or Somebody that I used to know? (and for a rematch between the same artists, Easy way out or Easy Way Out?)
And for the bonus round, Ben Folds did an entire multi-round contest against himself on the 'Way to Normal' : The b**** went nuts or The b**** went nuts, Free coffee or Free coffee, and a bunch of others.
The Hammer and I used to play this game a lot. My answers in the comments