4. Charlize TheronPhoto: facebook.com
To play prostitute and serial killer Aileen Wuornos in the movie Monster, South African beauty Charlize Theron gained over 30 pounds and wore prosthetic teeth. The end result looked nothing like Theron, but everything like Wuornos. Charlize is really bold and talented. While most women can’t stop crying over those extra pounds, Charlize Theron put on weight without hesitation.