This guy has been producing bangers for twenty years! From “Oops I did it Again” to “Shake it Off”. Almost twenty #1 singles in his career. To put that in perspective, that’s one less than The Beatles and seven more than Michael Jackson, although he still sits behind McCartney and Lennon in the all time rankings. Interestingly enough, he first offered “…Baby one More Time” to the Backstreet Boys, who turned it down, as well as TLC, until it fell into the hands of an eighteen year old Britney Spears.