"I don't like to wear underwear" - Christina Aguilera

Christina Aguilera doesn't just have an aversion to pants ... she also doesn't wear underwear!

The pop star was a guest on "Chelsea Lately" last night, where she made a very risque admission.

"I don't like to wear underwear," says Xtina. "I like to be as free as possible at all times. It’s just who I am.” TMI alert, right?!

The singer has caught a lot of flack from Chelsea Handler in the past for her risque attire, which usually brings a lot of attention to her chest.

Before agreeing to be on the interview, Aguilera made Chelsea dress up like her to make up for making fun of her.

video after the break...