Max Martin

I want to be part of every note, every single moment going on in the studio. I want nothing forgotten; I want nothing missed.

You need a balance at all times. If the verse is a bit messy, you need it to be less messy right after. It needs to vary. 'Shake It Off' is a good example, where the math behind the drama is pretty clear.

I don't think most people who listen to music are that interested in all the work that goes into making it. It's the artist you like.

Pop music follows the evolution of society in general: Everything moves faster.