Christina Aguilera's Rubenesque physique could pay off in a  huuuuge way -- TMZ has learned she's been offered $3 MILLION to be the face of a dating  website for "big and beautiful" women. Wait...when did Christina begin to be considered a "Big Girl"? She is not even close! I guess when u have a kid and get a booty your change ur status! SMH...CLICK HERE FOR MORE!