Here is my mashup of Justin Bieber's music video "Santa Claus is coming to town" with the song E.G.G.M.A.N, the theme of Eggman from Sonic Adventure 2 (Battle).I just thought that the industrialist music of Eggman suited the steampunk atmosphere a little more then the original music, but that's just me. 

Santa Clause is Coming to town is (c) 2011 The Island Def Jam Music Group/ Colombia Pictures.
E.G.G.M.A.N composed by Paul Shortino. (c) SEGA and it's Affiliates.