Ariana Grande made her live Grammy debut at Sunday's ceremony. After walking the red carpet with boyfriend Big Sean, she changed outfits before hitting the stage to perform "Just a Little Bit of Your Heart" off her album My Everything.
Accompanied by an orchestra, she showed off her flawless pipes while belting out the Harry Styles-penned ballad.
Ariana will kick off her "Honeymoon Tour" on Feb. 25 in Kansas City, Mo.
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