Blue is a fanmade Sing-a-ma-jig. He is blue, has the same ears as the New Red Sing-a-ma-jig, black circle eyes, a purple nose, a red mouth, the same shirt as the New red one but is dark green, the same arm pose as the Violet Sing-a-ma-jig, the same voice as the Lime Sing-a-ma-jig, the same feet as the Lemon Sing-a-ma-jig and he sings "Do Lord". He signs on by saying "Hi There!", enters song mode by saying "Song!" and signs off by saying "Bye bye!".

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