Christina Aguilera just proved she's one hot mama with a KILLER bod.

The 34-year-old took to Instagram to post a topless selfie in her chic bathroom wearing nothing but a pair of tiny hot pink panties — because this is Christina we're talking about, after all!

"Just so you know with me, it's all real, all the time," she captioned of the semi-nude snap. "Felt like it was time to start sharing some personal stuff with you guys… And it's just the beginning. Night night. X"

Well this is about as "personal" as it gets, Xtina!

Click through the gallery above to see the many ways celebs have gone topless on Insta!