Hmm...this is going to be my opinion
Just Dance vs
I Kissed A Girl: IKAG wins
Poker Face vs Hot N Cold: Poker Face wins
LoveGame vs
Thinking of You: Thinking of You
Paparazzi vs California Gurls: Paparazzi wins
Bad Romance vs Teenage Dream: Bad Romance wins
Telephone vs
Firework Firework wins
Alejandro vs E.T. : E.T. wins
Born This Way vs Last Friday Night: Born This Way wins
Judas vs
The One That Got Away: The One That Got Away wins
The Edge of Glory vs Part of Me: The Edge of Glory wins
You and I vs
Wide Awake : Wide Awake wins
Applause vs
Roar: Roar wins
Do What U Want vs
Dark Horse: Dark Horse wins
Katy wins for now.