Sasha Fierce meets Etta Jones

Oh my, Oh my. The lovely Beyonce Knowles packed in 15 pounds in preparation for her new role in the movie, "Cadillac Records" as Etta James.

Beyonce as her normal voluptuous self. Ad for American Express Card

Beyonce as Etta James for Cadillac Records

How did she pack in all that weight?!?! Hamburger Helper much?

Beyonce's third solo album " I am...Sasha Fierce" will be released on November 18, 2008.