Forgive me for posting this if it has already been done, but is there a post on here dedicated to the complete song writing/production credits for Max Martin and all the other Cheiron regulars like Dr. Luke, Shellback?
Welcome to the forum! ;D
For Max and Shellback: http://www.maratone.se/
Also in Wikipedia:
Max: http://en.wikipedia.org/wiki/Max_Martin_production_discography
Shellback: http://en.wikipedia.org/wiki/Shellback_%28producer%29
Dr. Luke: http://en.wikipedia.org/wiki/Dr._Luke_production_discography