Conversation so far:
who was simon seville of the chipmunks?
In addition to having an IQ just north of Einstein, Simon possesses a dry sense of humor as well as keen wit.
what can you tell me about him?
He is kind, gentle, logical, and at times poetic.

Question: who did he sing with?
Self-contained rewrite: who did Simon Seville of the Chipmunks sing with?