Dan + Shay Took The Roof Off Last Night At The Grammys!

Dan and Shay won their first Grammy at Sunday night's show.

They also sang their monster hit "Tequila" with a twist -- Shay held the last note of the song for an amazing finish. 

Shay Mooney talks about Dan and Shay's performance of "Tequilla" at the Grammys. OC:...

"That was one of the coolest moments of my entire life. Before we actually performed I was thinking I'm going to try to hold that note at the end until I pass out. And I think I almost did."