Mike Elizondo (born October 22, 1972) is an American producer, songwriter, and multi-instrumentalist. A protege of Dr. Dre, Elizondo is noted for a "stunningly diverse CV" that includes work with 50 Cent, Eminem, Carrie Underwood, Fiona Apple, Mastodon, Ry Cooder, Skylar Grey and Twenty One Pilots, among others. His songwriting credits include "In Da Club" by 50 Cent, Eminem's "Just Lose It" and "The Real Slim Shady", "Family Affair" by Mary J. Blige, and Carrie Underwood's "Cowboy Casanova". A Grammy Award-winner (and four-time nominee), He has been associated with records that have cumulatively sold more than 60 million albums in the United States alone.