The Voice coach explained on E!'s Chelsea Lately that she feels more liberated if she goes without knickers.
"I don't like to wear underwear," Us Weekly quotes her as saying. "I like to be as free as possible at all times.
"It's just who I am... It's empowering. It's p***y power!"
Aguilera also joked that she had only agreed to appear on the show on the condition that host Chelsea Handler would go without trousers during their chat.
"I've heard all about the s**t Chelsea has talked about me not being a fan of wearing pants," she quipped. "So when they asked me to come on, I thought, 'I'll do it, if Chelsea does one thing for me...'"
Aguilera recently said that she has started to embrace the aging process, saying: "I really love maturing and gaining wisdom."
She also claimed that she is "very comfortable" with her body following the release of the artwork for her album Lotus, which shows her emerging apparently naked from a flower.
Watch the video for Christina Aguilera's 'Your Body' below: