Birthday Song for Miku by MitchieM
MitchieM starts off the birthday festivities for Miku a bit early and it's awesome. Luka and Meiko sound human, Rin is pretty fantastic, Kaito gets some love, and Len gets a gold star for showing up.
The PV is also the shiniest thing I've seen in a long time.
Birthday Song for Miku
【ミクさんの生誕5周年をリンレン達5人と祝ってやる】Birthday Song for ミク
(MitchieM, feat. Rin, Len, Luka, Kaito, Meiko)
Also uploaded by Mitchie on Youtube.