Stevie Wonder doing 'We Can Work It Out' by the Beatles is one of my favorite records of all time.

So when I was working with Amy Winehouse on "Back To Black," you know, she had all these beautiful songs, incredibly well-written and just her on an acoustic, nylon-string guitar. And she'd play them for me, and then I would kind of drum up my idea of what I thought - make a demo with what I thought the drums should be doing, the guitars - like, quite a crude demo.

D'Angelo could sing the phonebook and it would sound good.

Dave Guy, the trumpet player, is an incredible musician. He came into the studio one day, and they had just cut a cover of "Sign, Seal, Deliver" for something with Sharon Jones, and I just was blown away by how they got that sonic. I mean, it was just so much the real deal.

So sometimes if I'm working with a rapper, like Ghostface Killah or Nas, producing usually means, in hip-hop, that you make the music. You make the beat, and you give it to them. And they write the rhymes.

You know, that was the first time [with Any Winehouse] that I probably ever used a baritone sax. And it's certainly the texture that, you know - it's all over the record 'cause it's a nice compliment to her tone.

I guess the best thing about having a successful record like this is, like, I know I'm at least good for another five years, like, before everyone starts to like - all the haters start to come out again. And that's really what it is.