Rihanna Celebrates Birthday With Katy Perry!
Chris Martin & Bruno Mars were also apparently present at the bash...
The Coldplay frontman, as they feasted on a Caribbean-style dinner and cupcakes decorated with the Barbados flag - a tribute to the R&B star's Bajan roots.
A bass drum player was also present at the event to play reggae tunes, with guests also given high-end Camacho cigars in their party bags.
A partygoer told People.com: "Rihanna was dancing all night and had an amazing time celebrating with her friends."
At the end of the night, RiRi was also presented with a personalised cake - which featured a bikini-clad icing version of the S&M hitmaker laying on top of it.