Could you pls help me with this question?
I read that one of the most popular way in 'modern songwriting' is writing to a track as a topliner. I'm only talking about writing a melody here - not about lyrics. So you have a backing track ready first, and then will try to write a melody to fit that track.
Does Max Martin ever use this method?
Thank you
Yes, very often!
Of course he does! Usually with the artists.