Katy Perry 3/30/12 Katy Perry Tweets Her Single Happiness Read More Katy Perry Katy Perry Look Back at All of Last Year's Memorable Celebrity Halloween Costumes! The 36 Best Celebrity Halloween Costumes, Ever Stars Love Disneyland as Much as You Do! Katy Perry Followed an Instagram Account Called "Slutty Taylor Swift" 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. Be in the Know With OurCelebrity and Entertainment Newsletter Personalize A-Listers Young Hollywood Movies TV Sign up with facebook or By signing up, I agree to the Terms and to receive emails from POPSUGAR.