Taylor Swift had better watch her back, because Simon Cowell has identified an up-and-comer who may be a challenger for her pop crown: ukulele-playing 12 year-old Grace VanderWaal, who made a huge first impression on the normally cranky judge on Tuesday’s “America’s Got Talent”;.

After a rousing performance of an original tune — that’s right, she’s also a songwriter — thunderous applause from the crowd led judge Howie Mandel to use his coveted Golden Buzzer on VanderWaal, describing the youngster as “a living, beautiful, walking miracle.”

Related: Howard Stern Reveals “Torturous’ Time On “America’s Got Talent’: “I Hated Every Bit Of It’

Cowell had this to say: “Grace, you know what I predict for you? I think you are the next Taylor Swift.”

Following her performance, the burgeoning singer-songwriter took to Twitter to share her flood of emotions:

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Watch her amazing performance right here: