Awkward! Katy Perry dodged Ryan Seacrest on the set of American Idol after she unexpectedly revealed her exit from the singing competition show, RadarOnline.com has learned. Perry, 39, seemingly avoided the longtime host and producer during filming following her shocking announcement that she would not be returning as a host after the upcoming season. Photos captured the bizarre tension between Perry and Seacrest while filming at the Aulani Disney Resort in Hawaii. While competitors and the cast danced and sang along with Mickey and Minnie Mouse, the 39-year-old host looked less than thrilled …