POPSUGAR Celebrity Bikini Pictures of Katy and Rihanna by Celebrity 9/20/10 0 Shares Like us on Facebook Sign up for our daily newsletter > Follow us on Pinterest Previous Photo 1 of 11 View on One Page ADVERTISEMENT ( more slides) Next Share This Link Copy 1 Pictures of Katy and Rihanna Previous Photo 1 of 11 View on One Page ADVERTISEMENT ( more slides) Next Read More Katy PerryRihannaBikini Rihanna In Case It Was Unclear, Rihanna Does Vacation Better Than Anyone Else Rihanna Opens Up to Vanity Fair About Chris Brown: "I Was Very Protective of Him" 40 Photos That Prove Rihanna's Giving Her Sexy Style a Break 13 Things to Know About Dior's Stunning PFW Show Katy Perry Katy Perry Gets Groped on Stage by an Overzealous Fan Look Back at All of Last Year's Memorable Celebrity Halloween Costumes! Katy Perry Is Living "That Bucket List Lyfe" at Machu Picchu These Celebrity Look-Alikes Will Blow Your Mind Bikini These Pictures of Shakira's Superfit Body Definitely Don't Lie! The Best Bikini Moments of 2015 — So Far! Christina Milian Brought the Heat to Miami With Her Sexy Bikini Body Cindy Crawford and Her Husband's Beach Bodies Prove Age Is Just a Number 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 Young Hollywood A-Listers TV Movies Sign up with facebook or By signing up, I agree to the Terms and to receive emails from POPSUGAR.