The girl sure can sing! 

Kelly Clarkson gave a heartfelt performance of "Mr. Know It All" on this week's Saturday Night Live. Clad in a fitted burgundy, leopard print dress, the 29-year-old hit every note during her hit song.

"Tonight was fun," she tweeted after her performance. "But now I'm having a glass of wine with the girls and about to go to bed. Long yet fun day."

SNL isn't the only NBC show on Clarkson's radar. Earlier this week, The Voice announced that she and Miranda Lambert would be joining Team Blake Shelton as advisers.

Watch Clarkson's SNL performance in the clip above!