<Li> Debra Jo Rupp </Li> <P> In 1991, Empty Nest spawned its own spinoff, Nurses, a sitcom about a group of nurses working in the same hospital as Dr. Weston . The three series (Empty Nest, The Golden Girls and Nurses) represented one of the few times in American television history that three shows from the same producer, all taking place in the same city and explicitly set up with the characters knowing each other from the very beginning, aired on the same network in one night . On at least two occasions, Harris wrote storylines which carried through all three series as fictional crossovers . </P> <P> The show's theme song was "Life Goes On", written by John Bettis and George Tipton and performed by Billy Vera . For the first three seasons, the song was presented in a slower, more melancholy yet comical arrangement . The original opening titles sequence showed Harry Weston taking Dreyfuss for a walk around town, with still images of the other regular cast members shown as they were credited . </P> <P> When the third season began, a new opening sequence debuted, made up of footage from the series' episodes showing each of the regular cast members . For the final four seasons the theme song was presented in a higher, more upbeat arrangement with female backup singers; the titles sequence style introduced in the third season remained . </P>

Who sings the theme song on empty nest