Silver with Blue Koala is a fanmade Sing-a-ma-jig Duet. The big one is mostly gray, has blue hair, has the same ears as the Santa Sing-a-ma-jig, has black circle eyes, an orange nose, a light purple mouth, the same hand pose as the Snowman Sing-a-ma-jig, and the same feet as the Lime Sing-a-ma-jig. The little one is the same shade of blue as the little one from the Gold duet as seen in the picture, has the same ears, hands and feet as the little one from the Gold duet but with just one hand in the air, lime green circle eyes, a yellow nose and a mouth that is the same shade of green as the little one from the gold duet in real life. They sing "Sing, Sing, Sing". The big one has the same voice as the big one from the Orange duet (for sign on, going to song mode and sign off) and frost (for singing, harmonizing and chattering) and the little one has the same voice as the rose (while going into song mode the same way as the big one from the Sea Green duet). They sign on, enter song mode and sign off the same way as the Orange duet but with the little one having the same voice as the Rose Sing-a-ma-jig.