Conversation so far:
Who is Alvin?
The group's name changed from the "Chipmunks" to "Alvin and the Chipmunks".
Why was the name changed?
Titled simply Alvin and the Chipmunks, the outline of the show closely paralleled the original Alvin Show.
What is well known for Alvin and the Chipmunks?
Show.
The series lasted eight production seasons, until 1990.

Question: What happened after 1990?
Self-contained rewrite: What happened to Alvin and the Chipmunks after 1990?