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Taylor Swift has  A LOT of friends. But do you ever wonder how her friendships get started in the first place? Tay is sharing the moment she realized she and Sam Smith would be "friends for life" in a recent interview with Rolling Stone.

T-Swift's Sam Smith friendship epiphany happened during last fall's American Music Awards -- and it involves Ariana Grande and her dance moves. Tay tells Rolling Stone:

"We were front row watching watching Ariana Grande, loving her performance. We're both pretty animated when we're watching other artists. At the end of her performance, she did some dance move that was so sexy and so cool, and at the same time, Sam and I both screamed out 'YAS B**CH YAS!!' and then looked at each other and died laughing. I had this feeling that we'll be friends for life."

That Ariana Grande. Bringing friends together since 2014. And as you'll recall, they were both getting down to Jessie J during "Bang Bang" as well.

Photo: Getty Images