The Brady Bunch ventured into music in 1970 by releasing a Christmas album called Merry Christmas From The Brady Bunch
. The "Amateur Nite" episode showcased their singing and included another performance as well: another original song called "It's A Sunshine Day
." They released four albums and even toured, playing state fairs and the like, sometimes as an opening act.
For the most part, they did their own singing, although "Keep On" sounds pretty slick and because all the voices are singing at once, it's possible they got some professional help. On "It's A Sunshine Day" four of the kids do solos and it's clearly their voices.
The final season of the show, in 1973, opens with another musical episode: "Adios, Johnny Bravo," where they sing two more songs: "You've Got To Be In Love (To Love a Love Song)" and "Good Time Music." In 1976, the Bunch
returned to TV with their own variety show, The Brady Bunch Hour
, that lasted one season. They closed every episode by singing "United We Stand