Christina Aguilera has always worn a lot of makeup when performing on stage, and when I say a lot I mean so much she often makes clowns feel like their faces aren't painted enough.
This thick layer of makeup has become a signature part of Christina's stage persona- and it has made her nearly unrecognizable without makeup. Here she is appearing au naturale in a cover shoot for Paper Magazine:
It's strange that someone so beautiful feels the need to wear so much makeup all the time, but it probably helps her avoid the paparazzi when she goes out in public as her unpainted self!
-Via Bored Panda