4: John Paul George Ringo is a digital extended play compilation released on 23 September 2014, as a free download by the iTunes Store. It features one solo song by each former member of the Beatles: John Lennon, Paul McCartney, George Harrison and Ringo Starr. It is the first official release to bring together their solo material (though two Starr solo albums, Ringo and Ringo's Rotogravure, and the 1996 Carl Perkins album Go Cat Go! featured contributions from each of the four).