who sang what goes on behind closed doors
Charlie Rich In the later part of his life, Rich acquired the nickname the Silver Fox. He is perhaps best remembered for a pair of 1973 hits, "Behind Closed Doors" and "The Most Beautiful Girl". "The Most Beautiful Girl" topped the U.S. country singles charts, as well as the Billboard Hot 100 pop singles charts and earned him two Grammy Awards. Rich was inducted into the Memphis Music Hall of Fame in 2015.