ビバハピ (Viva Happy)

Background
Viva Happy is Mitchie M's seventh original work, sung by Hatsune Miku. Mitchie M commented that he tried to tune Miku to sound like a "Japanese animation voice actress" (specifically, Saki Fujita, Miku's voice actress). Like all of Mitchie M's Vocaloid works, it is noted for the realistic quality of Miku's voice.

This song has entered the Hall of Fame. It topped Nico Nico's Vocaloid ranking twice, during weeks 304 and 305.