Rick Rubin is a record producer. His real name is Frederick, but I'm sure we're all okay with him going by Rick. He's the co-president of Columbia Records and was a founder of Def Jam Records, so he obviously knows his stuff.
Here's an "interesting" interview with Rick, if you want to get to know him better:
Sorry for the tease. I HAD a clip with Rick and Lil Jon all lined up, but then it disappeared from YouTube because the user had their account terminated. Instead, just to show how versatile Rick is, I'll use the Dixie Chicks clip.