The oh-so-adorbs moment went down when Tay Tay got sentimental at her concert, and took us all back to her Speak Now days.
"I wrote it when I was like 18 or 19 but my friend just had a baby and she made me godmother of it and I was holding this little baby the other night and I was just thinking differently," she explained when referencing Jaime and the baby.
"When you're holding onto something that's so innocent and so perfect and has no idea what's coming for it with the world. The world is going to throw so many things at you as we grow up."
That's when she busted into "Never Grow Up" and basically the whole world swooned.
"To you, everything's funny/You got nothing to regret," Taylor began to sing. "I'd give all I have honey/If you could stay like that."
She continued, "Oh darling don't you ever grow up, don't you ever grow up/Just stay this little."
Once the tribute started to spread online, Jaime herself couldn't help but to be touched by the moment.
"This is so beautiful Tay," she wrote on Twitter. "Leo Thames is so blessed."
Less than three weeks ago, Taylor was able to meet Jaime's second child for the first time. Taylor shared a picture of the baby on Instagram and even quoted lyrics from "Never Grow Up" then, too. #CutestGodmotherEver