Aubrey O'Day was no more than an A cup before plastic surgery, but with breast implants, her breast size is now a huge 34D. This before and after pic shows just how different she looks. It's uncommon for someone to jump 3 cup sizes and not be a freak afterwards. Even though Aubrey O'Day's bra size is comically big, she's still a respectable actress and has maintained a positive public image. Just look at how big of a difference her boob job made for her appearance.