Nicki Minaj, the one and only “Black Barbie,” celebrated her birthday with the breast birthday cake ever. The hip hop star turned 31 years young and for some reason felt like she needed a new pair of boobs. Hey, it’s less invasive than plastic surgery. Do you think the cake was molded from hers truly? Check out the rest of Nicki’s birthday celebration over at TMZ. You won’t want to miss the incredible Barbie-pink car she rolled up in.