POPSUGAR Celebrity Katy Perry Slide Picture of Katy Perry in a Red, White, and Blue Polka Dot Dress in London Red, White and Beautiful by Celebrity 9/03/10 0 Shares Like us on Facebook Sign up for our daily newsletter > Katy Perry arrived at a radio appearance in London on Thursday in a form fitted polka dot dress. Image Source: Pacific Coast News Online Read More Katy PerryHot Katy Perry Katy Perry's Left Shark Made a Cameo in Taylor Swift's "Bad Blood" Performance Katy Perry and John Mayer Break Up . . . Again From Friends to Straight-Up Enemies: A Taylor Swift and Katy Perry Timeline Katy Perry Shares Her Secret to Feeling Happy About Your Looks POPSUGAR, the #1 independent media and technology company for women. Where more than 75 million women go for original, inspirational content that feeds their passions and interests. Get the scoop with our daily newsletter A-Listers TV Movies Young Hollywood Sign up with By signing up, I agree to the Terms and to receive emails from POPSUGAR. 4 years Radio 1!! Katy was in a white room live on camera doing whatever the radio 1 viewers wanted her to do. It was one word! WERID.