Honestly, I was always bugged by the fact that the songs "Four" and "With Every Beat of my Heart" from Little Jerry and the Monotones use the exact same melody and vocal range.
I get that Jeff Moss did make some of his other songs sound similar (like Proud, I'm Gonna Always Love You from the Muppets Take Manhatten and argubaly Mountain of Love), and I get that both Little Jerry songs are album only songs, but come on, man. It just feels like laziness and at least the other songs mentioned have different meldoies and vocal ranges.
Not to mention, I was bugged by how high and whiney Little Jerry's voice sounded, and that's one thing I didn't like what Jerry Nelson did in the songs "Proud", "Sad", "Surprise" and the album version of "Telephone Rock."