I've done a few talks on songwriting and the first thing you are always asked is, does the tune come first or the words - my answer is both. Sometimes it's the tune sometimes it's the words and often they come together. I also add - don't question it, just be grateful that it's happening, and make the most it.

Don't believe that guy calling himself Peace - he's a great songwriter and would be recognised as such anywhere in the world, never mind the UK. :)