Beyonce used ice cream to add pounds for movie role

Beyonce Knowles piled on the pounds to play R&B great Etta James with the help of butter pecan ice-cream.

The singer/actress gained 20 pounds to play the singer in new movie 'Cadillac Records' and admits she indulged in frozen treats to bulk up.

She says: "I ate a lot of butter pecan ice-cream it when I was preparing for Cadillac Records. I was able to eat as much as I wanted because they wanted me to gain the weight. It was heaven."