Katy has 13:
Best Female Pop Vocal Performance ("I Kissed a Girl")
Best Female Pop Vocal Performance ("Hot N Cold")
Best Pop Collaboration with Vocals ("California Gurls"
Best Female Pop Vocal Performance ("Teenage Dream")
Best Pop Vocal Album ('Teenage Dream')
Album of the Year ('Teenage Dream')
Best Pop Solo Performance ("Firework")
Record of the Year ("Firework")
Best Pop Solo Performance ("Wide Awake")
Best Pop Solo Performance ("Roar")
Song of the Year ("Roar")
Best Pop Duo/Group Performance ("Dark Horse")
Best Pop Vocal Album ('PRISM')
0 wins. Legend