Charlie Rich 's songs `` Behind Closed Doors '' and `` The Most Beautiful Girl in the World '' were released in 1973 .
Charlie Rich 's pioneering contribution to early rock n ' roll has been recognized by the Rockabilly Hall of Fame , but he is perhaps best remembered for a pair of 1973 hits on the U.S. pop and country charts : `` Behind Closed Doors '' , and `` The Most Beautiful Girl in the World '' .
Charlie Rich