Castle On The Hill Ed Sheeran
Katy takes on Gaga for a brand new MTV award.
Katy Perry will take on Lady Gaga for the Best Video With A Message award, a brand new addition to the MTV VMAs.
The idea behind the award is to support artists who stand up for key issues and empower their fans through their music videos.
Lady Gaga's 'Born This Way' has been chosen for promoting a, "world free from prejudice, judgment and self-doubt".
While 'Firework' from Katy Perry has been selected for, "celebrating the spark and originality in all of us".
Other nominees include Pink's 'Perfect' and Rihanna and Eminem's 'Love The Way You Lie'.
The MTV VMAs will take place on Sunday 28th August in LA.