AMAs 2015: Ariana Grande's Grandmother Steals the Show

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Ariana Grande's Nonna is totally a scene stealer!

Grande's grandmother, Marjorie Grande, sat front row with the singer during Sunday's American Music Awards, dancing along to her performance and offering a congratulatory kiss on the cheek as the 22-year-old won the award for Favorite Female Pop/Rock Artist.

WATCH: Ariana Grande Reveals How Nonna Inspired Her Platinum 'Focus' Hair 

"I think I owe a lot of this to my Nonna, who made who made sure to remind me that she voted," Grande said from the podium. Affecting a heavy New York accent, Grande went on to adorably impersonate her Nonna. "She goes, 'Ariana, I went on the computer. I voted, so I think you'll win."

Grande switched up her hairstyle twice during the show, rocking curly, loose locks during her performance of "Focus" and a chic top knot for her acceptance speech. In late October, after debuting a platinum 'do in her "Focus" music video, Grande told ET at the time that her Nonna had actually inspired the new look.

"I wanted to do my ponytail in white for a while, or in a different color," she said. "I actually was sitting opposite my Nonna and I was like, 'Nonna, I love your white hair. It's so beautiful.'"

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So yes, we have Grande's beloved Nonna to thank for the jaw-dropping look and "endless inspiration," the singer says.

See the interview in the player below!