[on recording the duet, "Who You Love", with Katy Perry] I had this little chorus for years. And it was 'You love who you love' and I thought that was always going to be a great thing someday to have a song that people could hear and feel that sort of permission. And then it came out again and sometimes you just have to play stuff for other people... And I played it for Don Was, the producer of the record, and he went, 'That's something' and I said, 'I don't know' and then he said, 'Why don't you get Katy to do it?' And my first thought was, 'You can't do that' and then the more I thought about just the music part of it, it made perfect sense. Even if I didn't know Katy, it would have made perfect sense... For me, it always had to be about the song. It's a pretty big moving target to be a couple and have a song but I think there's an authenticity to it when you hear it.
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