Who knew she had such a hot bod?

Lady Gaga just took to Twitter to wish her followers a happy New Year, and the singer treated them to a pic of herself in a white thong bikini. Look at that butt!

"Happy New Year. To happiness. Health. Love. And to the simplicity of beautiful unforgettable nature, life," she wrote.

Mother Monster has a lot going on these days! Her album Joanne has been nominated for multiple Grammys, she just inked a huge deal for her upcoming Las Vegas residency, she has her movie A Star Is Born with Bradley Cooper coming out... oh, and she's engaged to talent agent beau Christian Carino!

We don't where she finds the time, but clearly she's been doing her squats!