Rihanna is allegedly planning a wild bachelorette party for Katy Perry before she gets married to Russell Brand.

A source told More! magazine: "Katy's totally excited and keeps telling Russell her party is going to be every bit as wild as any party he and his boys will throw! She and Rihanna have become very close. So Rihanna has offered to plan a girls' getaway and also help out with anything else Katy needs for the wedding."