Conversation so far:
When was barbershop released by The Osmonds?
The Osmond Brothers began as a barbershop quartet consisting of brothers Alan, Wayne, Merrill and Jay.
What happened after the Osmond Brothers were a barbershop quartet?
With the addition of Donny, the group became known as The Osmonds; performing both as teen idols and as a soft rock band, their peak lasted from 1971 to 1975.
what other shows are they in?
By 1976, the band was no longer producing hit singles; that year, they transitioned into television with Donny & Marie, a popular variety show that ran until 1979.

Question: How did that show do?
Self-contained rewrite: How did that show do?