If Rihanna's 22nd birthday celebrations are anything to go by then celebrities really know how to partaay in style!

However, the party planner wasn't RiRi...Oh no, it was Matt Kemp...the guy that she is rumoured to be dating and who she got close to on a recent trip to Mexico.

According to eonline.com, RiRi was “shocked” because she was only expecting a small get together.

And what would a party be without decorations, nibbles and drinks? Rihanna's party was decorated with flowers with tiki torches in the pool, and the guests could munch on sprinkles cupcakes and sip on engraved bottles of Ace of Spades and Johnny Walker Blue.

“There was a photo booth customised specifically for the party and an Ace of Spades toast upon Rihanna's entrance to the room.”

And if ever there was a unique birthday cake especially made for the birthday girl, then the cake that was decorated with RiRi's various tattoos was just perfect!

But her surprises didn't stop there, Matt gave RiRi a custom diamond necklace as a gift.

The source said, “It was so sweet and she really was surprised...she looked just beautiful.”

Take a look at Rihanna at work for her new video...