Photos: Nicki Minaj Celebrates Her 31st Birthday With A Boob Birthday Cake!

Nicki Minaj turned 31 years old yesterday and she celebrated with two voluptuous helpings of boob cake!

After arriving in a hot pink Lamboghini, the rapper strolled into Philippe restaurant in Bev Hills last night where she partied with friends.
The sweet treat read "Shake your ... for Nicki".

See more pics after the cut