Real name: Łukasz Sebastian Gottwald

Also known as:
Luke Gottwald
Dr. Luke

A musician, songwriter and producer who has written and produced for artists such as Kelly Clarkson, Lady Sovereign, Kelis, Avril Lavigne, Missy Elliott, P!nk, Mos Def, Backstreet Boys, Daughtry, The Veronicas, Paris Hilton and Skye Sweetnam. He was also the guitar player in The Saturday Night Live Band.

His companies:
Kasz Money Productions, Inc.
Kasz Money Publishing