I can sing all of the words to the theme song for Disney's Adventures of the Gummi Bears, a Saturday morning cartoon that ran from 1985-1991.
The math on this is a little disconcerting, given that I was 14 years old in 1985.
I can also sing the theme songs to the first two seasons of Star Blazers, an American animated television series adaptation of the Japanese anime series Space Battleship Yamato. When I was watching it in the early 1980's, it was an after school cartoon on the UHF stations.
The fact that these two theme songs are also embedded in my mind is disconcerting.