GRAMMY PERFORMANCES
Grammys 2015: Ariana Grande Performs 'Just a Little Bit of Your Heart'
Kevin Winter/WireImage
Ariana Grande performs onstage during The 57th Annual Grammy Awards at the STAPLES Center on Feb. 8, 2015 in Los Angeles, California.
Ariana Grande only wants a little bit of your heart at the Grammys.
Anna Kendrick introduced Grande, who sang "Just a Little Bit of Your Heart" amidst the lights and fog on stage.
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The singer's slowed-down ballad, accompanied by a piano, impressed the crowd.
