The Carstairs' "It Really Hurts Me, Girl" endures among the most controversial and influential singles ever popularized within Britain's Northern Soul club scene. An absolutely brilliant record that uniquely captures the tectonic shift between the deep soul of the late '60s and the shimmering, propulsive Philly soul of the early '70s, it singlehandedly altered the direction and sensibility of the Northern scene. For a group of such historical importance, it's ironic that almost nothing is known about the Carstairs themselves -- even the lineup is a mystery. "It Really Hurts Me...