Christina Aguilera Flaunts Boobs and Skinny Figure in Topless Selfie

"Dirrty," indeed! Christina Aguilera went on an Instagram spree last night posting a bevy of intimate photos from inside her home. However, one sexy snapshot in particular turned the most heads among her fans. The 34-year-old mother of two stripped down (punned intended) to just tiny pink panties to pose for a topless selfie that shows lots of cleavage and boobs. Xtina's tummy looks super flat and her figure in perfect shape as she covers her nipples with her arms in the nearly naked photo.