Ariana Grande Sings 'My Everything' for Grandfather at Stand Up to Cancer

Ariana Grande belts it out during Stand Up to Cancer on Friday evening (September 5) in Hollywood.

The 21-year-old singer performed her new song “My Everything” in honor of her grandfather who passed away from cancer.

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“supporting a cause that is near & dear to my heart. tonight I’m singing for grandps! i miss u #StandUpToCancer @su2c,” Ariana tweeted before hitting the stage.

After the event, she tweeted: “sobbed my eyes out as soon as I got back. idk how he was just here & now he’s not & I’m singing a song in his honor. sucks a lot #f–kcancer.”

Watch her emotional performance below.

FYI: Ariana is wearing a Misha Collection crop top & skirt.