Philadelphia singer PnB Rock introduces his warbling, Auto-Tune-heavy style to the world on his debut album, GTTM: Goin Thru the Motions. He mixes synthetic vocal lines with sharp pop instincts on the snappy “There She Go,” while the rasping drum machines and flaring keys of infectious love song “Selfish” blur the line between twisted and beautiful. There are grimmer ripples to be found in his alt-R&B, too, as heard in the dark, chugging synths of the Wiz Khalifa-featuring “Attention.”