Darius says logistics kept them from singing the song together in the studio, so they recorded their parts separately.
"If you listen to it, you're going to think that we sat down and said you're going to sing here, you're going to sing there, we're going to do it like that. It didn't happen. It was just like organically when we were listening to it, mixing it and putting it together, it's perfect the way it goes."
When Was the Last Time comes out on October 20th.
Photo: Getty Images