Rihanna celebrated her 23rd birthday on Sunday night with a celeb-packed party -- and we've got some shots from inside the lavish bash!

The party, which was sponsored by NIVEA USA, was held at a private home in Beverly Hills after the NBA All-Stars game -- where guests reportedly included Zac Efron, Snoop, Diddy, Ryan Phillippe, Cee Lo, Jay-Z, Mary J. Blige, Christina Milian and Joel Madden.

Rihanna danced the night away in a tight pink dress with a fringe skirt and feasted on some Sprinkles cupcakes decorated with the Barbados flag.

Check out all the party pics!

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