Christina Aguilera had a boob job early in her career. The plastic surgery increased her breast size pretty dramatically. If you're a skeptic and don't believe she's had breast implants then look at the before and after pictures. Christina clearly has a larger breast size in the after pictures. You might just think that's just a young Christina Aguilera. Scroll down... Here she has a very noticeable breast implant scar under her right armpit. That was where the plastic surgeon inserted the implant.