P!nk:

Nate wasn’t sure that he wanted to be on a collaboration with a pop star. Their label is an independent label, they weren’t sure. And I just kept telling them — well, I kind of tricked him into doing it, because we wrote the first verse the first day and basically the chorus, and then I went home and I was looking over the lyrics and thinking about the song, and it was never supposed to be a collaboration. We were just collaborating as writing partners. But I was like, “This song is a conversation between lovers.” And he had to do it because he’s my favorite voice right now, aside from probably Adele. I went back in and wrote the second verse and I sort of pitched the song.

–via Billboard (2013)

Nate Ruess:

I went into it just obviously coming from a completely different world than where Pink is from,“ he recalled to MTV. "Writing the song was a whole different learning experience and was really fuelled by the fact that Alecia is so strong and independent and so very much herself. At the end of the day it’s so hard to argue against her because what she does it always so great.

It felt awesome, because I wrote that song, I fought for that song, I fought to have Nate do that song, I fought for the entire thing. And it took many, many months to make that song happen. And I just didn’t give up. When I fucking want something I go after it.

— via Billboard (2013)