Mila Kunis is opening up about her intense prep for Black Swan. The Family Guy voice actress and Natalie Portman sat down for a joint interview with Vogue published on Friday, and got REALLY real about her eating habits for the 2010 film. She told the outlet: "My prep was a lot of dancing and very little eating - which I know you're not supposed to say, but it's the truth. I drank a lot of broth and danced for 12 hours a day." Yikes... That does NOT sound like a healthy balance.