J.U.S.T.I.C.E. League, which stands for Just Undeniably Some of The Illest Composers Ever, are a Grammy winning group of producers and instrumentalists from Tampa, Florida. The group consists of members Rook, Colione, and Kenny "Barto" Bartolomei. Most recently, they have been producing for Drake, Young Jeezy, Keyshia Cole, Mary J. Blige, Rick Ross, Nas, Jay-Z, Lloyd Banks, 50 Cent, Tech N9ne, Jay Rock, Yelawolf, and many other artists. The group takes their name from the DC Comics superhero team the Justice League. A trademark of a Justice League production is a female voice echoing the words "Justice League" twice at the beginning of most of their songs.