Sky Blue is a fanmade Sing-a-ma-jig. He has the same ears as the big one from the Fuschia Sing-a-ma-jig Duet, he has the same eye color as the mint green Sing-a-ma-jig with circle eyes, he has a pink nose, a purple mouth, the same arm pose as the lilac Sing-a-ma-jig, has an orange shirt with yellow lines, a voice mix of the lime green one and the tangerine one, the same feet as the Tangerine Sing-a-ma-jig and he sings "The Bear Went Over The Mountain".
Sky blue sing a ma jig

This is what he looks like.