Chances are Antonio "L.A." Reid, the only non-singer on this list, is responsible for signing your favorite performer. Before leaving his post at Island Def Jam to discover talent on the U.S. edition of "The X Factor," Reid worked as president and chief executive of Arista Records and was co-founder and co-president of LaFace Records. He's had a hand in albums from artists including Mariah Carey, Justin Bieber, Kanye West, the Killers, Bon Jovi, Jennifer Lopez, Rihanna, Avril Lavigne, Pink, Usher and OutKast. The Grammy Award-winning producer was recently named chairman and chief executive of Epic. How you know him: Pink's 2002 hit "Don't Let Me Get Me" takes a jab at Reid's assertion that she needed to stick close to the R&B/pop of her debut album.
Chris Pizzello / Associated Press