Ariana Grande Breaks Just A Little Bit Of Your Heart With Her Grammys Performance!

Ariana Grande may have performed her song Just A Little Bit Of Your Heart, but she used ALL of her lungs to do it!
The Problem singer brought the tone of the Grammys down while hitting every single high note!
She even seemed shocked at how well she performed; the second the song ended, she covered her mouth in shock!
Awww, so cute!
Ch-ch-check out the video (above) to see the flabbergastingly flawless performance!