4. Christina Milan turns 31
Happy birthday, Christina Milian. C.Milli will likely be partying from "A.M. to P.M." as she celebrates her 31st birthday!
Get the latest on your favorite stars like Serena Williams, who is blaming the paparazzi for rumors that she’s dating her coach. Then check out Rihanna’s new single "Diamonds." And Ludacris is trying to keep up with Kelly Rowland on his hot new track "Representin." But first, be sure to wish Will Smith a happy birthday!