I think that where it came from and the initial birth of it - it did come out of a jam at Bruno's studio, you know? He was playing drums. And Jeff Bhasker, who co-produced the record with us, is on synths, and I was playing bass.

You know, it's weird. It's - it hasn't really changed my life in any kind of way that I can measure. I mean, it's obviously such an insanely amazing thing. You know, none of my other records I've ever had before even broke into the top 100.

I had a somewhat frenetic childhood because my mum and dad split up when I was five, and then my mum remarried.

Basically, there's a good friend of mine who works at EMI Publishing, a publishing company. He had asked me - he was like, you know, do you know this girl, Amy Winehouse? She's in New York for a day. She's kind of meeting people to maybe work with on her second album.

I mean, my wife is always like - I don't write lyrics. So I couldn't, like, really technically write a song for anyone. I could write a very nice instrumental. So she always sort of gives me a hard time because it's just such a ridiculously impossible standard to live up to, that your step-dad wrote that song for your mom.

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.

I think Katy B encapsulates young London in a way I never could. She reps London harder than anyone song-wise since Lily Allen.