Rihanna showed off her bikini body home in Barbados yesterday, and this time she was joined by fellow singer Katy Perry. Katy rocked a more retro swimsuit as opposed to the skimpy two-piece we saw her in over New Year's. After rumors that Rihanna was upset that Chris Brown was seeing other women, some girl time might be just what Rih needs. The sentiment could even carry into an upcoming tour — Rihanna is apparently looking to hit the road in September with a couple other female singers with a "women empowerment" show. Who knows, maybe Miss Katy Perry can even join in the fun.