The Kate Upton breast implants mystery hasn't been solved. People think that she looks too perfect to be plastic surgery free, but there's really no evidence to support it. Her breast size is listed at 33D, but they're ideally shaped and not saggy. Because it's not proven that Kate Upton has had a boob job, there's no before and after photos. But, browse these 3 photos and decide if you think she had plastic surgery.