Ariana Grande and Her Nonna Twin with Matching Gray 'Dos

Ariana Grande continues her silver streak for a big celebration.

After test-driving the granny hair trend just last week with an oldies-inspired dye job, the "Into You" songstress showed off her gray strands a second time, proving that imitation is the sincerest form of flattery as she twinned with her beloved 92-year-old nonna.

On Thursday, the pop star commemorated her grandma's birthday with a selfie of the inseparable duo, and the resemblance is uncanny. "Happppppy birthday queen motha! the epitome of style, grace, hilariousness and bad ass Italian grandmotherness," the 24-year-old captioned the black-and-white shot.

She continued her heartfelt message: "The toughest of cookies and an inspiration to all! I'm SO GRATEFUL to be here with her to celebrate! 92 neva looked so fly."

Here's to a wonderful weekend of festivities for these chic gray-haired ladies!