By Leah Greenblatt
Updated September 07, 2010 at 01:20 PM EDT

iPhone ad-soundtracker, folkie, and FOJJ (Friend of Jack Johnson) Matt Costa will release his third full-length, Mobile Chateau, on Johnson’s Brushfire Records this September 21.

In the meantime, you can stream “Johnny’s Love of Majik,” a Mobile track, exclusively hear on

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