Rihanna is feeling a little stressed these days. Her BFF Katy Perry is jumping the broom soon and RiRi is responsible for planning the bachelorette party. The pop star wants her friends’ pre-wedding celebration to be just as elaborate as her wedding day, reports PerezHilton.com. The starlet said, “it’s taking up way more time than my tour. It’s so much pressure. Her wedding is going to be the best wedding I’ve ever been to, and now I have to match the bachelorette party to that!”