I wanted to create this thread to see if everyone else shares the same interest/curiosity as me. In my opinion, Session singers are important in Pop Music because at times they create more vocal depth / instrument / backup and then there are some who are used as a main vocal (mostly not credited). I wanted to see if people notice this and if it changes the perception of a song? I personally love it when someone completely random appears on a track. I'll list a few of my favourites in another post.