Secretive Pennsylvania soundstage few have heard of quietly hosts superstars everyone has heard of

LANCASTER COUNTY, Pa. (WHTM) -- Asked who's on stage in Studio 1 -- basically a stadium with a concert stage, complete with lights and a sound system and all the rest of it, but minus the stadium -- Andrea Shirk doesn't hesitate. "Elvis," Shirk says. "Have you ever heard of him?" Obviously -- never mind [...]