Harry sings backing vocals for "You're Sixteen"
Harry sings backing vocals for "Lady Gaye"
Stop and Smell The Roses
Nilsson produced and sang backing vocals for "Back Off Boogaloo", "Drumming is My Madness", and "Stop and Take the Time to Smell the Roses".
Harry appears as Guest Artist on "Runaways"
Harry sings backing vocals for "The No No Song" and for "Only You". Ringo sings Harry's "Easier For Me" Nilsson also contributed to many other Ringo works.
If you know of any other "covers" not mentioned here, please email nilssonian(a)yahoo.com or twitter @nilssonian