Grammys 2015: Ariana Grande Performs 'Just a Little Bit of Your Heart'

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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.