CMJ 2012 CMJ has announced the third round of artists to be officially confirmed for this year’s CMJ Music Marathon. These additions continue the tradition of adventure and discovery for which the festival is known, and include the following: Ghostface Killah, Asher Roth, Dum Dum Girls, Eleanor Friedberger, Q-Tip, Theophilus London, Doldrums, Chad Valley, Prong,…