Conversation so far:
Was bob newhart a singer?
Newhart became famous mostly on the strength of his audio releases, in which he played a solo "straight man.
Did he ever have a top ten album ?
Button-Down Mind of Bob Newhart (1961), The Button-Down Mind on TV (1962), Bob Newhart Faces Bob Newhart (1964), The Windmills Are Weakening (1965).

Question: Were there any other famous people on any of his albums?
Self-contained rewrite: Were there any other famous people on any of Bob Newhart's albums besides The Windmills are weakening? ?