21-Hit Wonder - Hollander, Sam

As one of the most renowned songwriters and producers in the game, Sam Hollander has had multi-platinum success writing and producing for the likes of Panic! At The Disco, Fitz and the Tantrums, Weezer, Katy Perry, Train, One Direction, blink-182, Daughtry, Ringo Starr, Carole King, Gym Class Heroes, and many others.