With celebrities like Justin Bieber and Niall Horan helping her out, it was always going to be a success, but one thing the fans were begging for on Twitter was a reunion duet of her and Miley Cyrus' Happy Hippie performance of "Don't Dream It's Over."
When the original came out, it started the internet's obsession with their pure, amazing friendship.
So, when Miley announced she was joining the benefit concert, what better time to join forces again?!
Well fam, they listened. The two performed the song together on stage at Manchester, and it was more beautiful than you ever expected.
With lyrics like, "When the world comes in / They come, they come / To build a wall between us / We know they won't win," it stood for something really important on such a special day.
Watch their performance below, and grab the tissues while you're at it.