Philly blues-rock combo Big Terrible is gearing up to usher its third release into the world; the Rotten City EP gets its physical unveiling tonight at North Star Bar, and has been streamable at Bandcamp since the beginning of the month. The four-piece band has been around since 2009, and digs deep into a very classic rock fusion of powerful gospel vocals and raw Americana instrumentation. And on hand to sing backups is Philly’s premier gospel-Americana vocalist, Ali Wadsworth. While she’ll be releasing her own solo record later this year, her commanding voice can be heard harmonizing with onetime Toy Soldiers backup singer Vinchelle Woods on two of Rotten City‘s tracks. Tonight, Wadsworth contributes an opening set to Big Terrible’s album release show along with Satellite Hearts and Jamie Victor. Information on the show can be found here. Below, stream “Substance” and “The General,” the two of Rotten City‘s songs Wadsworth sang on.