sentences:  Chalmers located a studio in Las Vegas, where he sang back up on a Frank Sinatra session.After working for several years in Vegas, Charlie and his group were called to Miami to do some sessions at Criteria Studios.For the next few years, they recorded with artists including Andy Gibb, The Bee Gees, Fire Fall, Harry Chapin, John Mellencamp and K. C. and the Sunshine Band.