who sings the theme song for three's company
Ray Charles (musician, born 1918) As a vocalist, Charles, along with Julia Rinker Miller, sang the theme song to the television series Three's Company ("Come and Knock on Our Door").[4][5] As a songwriter, Charles was best known for the choral anthem "Fifty Nifty United States" in which he set the names of the states to music in alphabetical order. It was originally written for The Perry Como Show.[5] He is also known for "Letters, We Get Letters",[6] also originally written for Como's show and later used on the Late Show with David Letterman.[6]