Conversation so far:
Who is Alvin Seville from Alvin and the Chipmunks?
Alvin Seville is the lead vocalist and is the oldest of the Chipmunks.
Why was the name changed from The Chipmunks to Alvin and the Chipmunks?
What is Alvin and the Chipmunks well known for?
Through the continued success of the franchise, Alvin and the Chipmunks have become the most successful children's artists of all time.

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