Nilsson was a regular contributor to The Monkees and a good friend of Mickey Dolenz.
The Monkees performed Nilsson's "Cuddly Toy", written specifically for The Monkees
An album by The Monkees. Nilsson sings backing vocals for the song "Auntie's Municipal Court" and plays keyboards for "Zor and Zam".
Nilsson sings backing vocals for the song "Door Into Summer"
If you know of any other "covers" not mentioned here, please email nilssonian(a)yahoo.com or twitter @nilssonian