- English: Live Happy
- Official English: Viva Happy
Published July 26, 2013, with 3,929,000+ Niconico views, 11,509,000+ YouTube views, 111,500+ bilibili views, and 191,400+ SoundCloud views
- Mitchie M (music, lyrics)
- cort (MV direction, character animation)
- TOHRU MiTSUHASHi (compositing)
“Hatsune Miku Sang with Talk and Rap like a Voice Actress! I tuned Hatsune Miku like a voice actress, and tried making a song with talk and rap. I tried hard to make use of the characteristics of Saki Fujita's voice as a voice actress, so I would be happy if you enjoy it.” —Author's comment"Viva Happy" is an original song by Mitchie M. It was uploaded to bilibili on July 10, 2015, and to Soundcloud on September 12, 2015. Like all of his Vocaloid works, it is noted for the realistic quality of Miku's voice. The video features many Miku MMD models.
This song has entered the Hall of Legend and exceeded over 10 million YouTube views. It also topped the Nico Nico Weekly Vocaloid Ranking during weeks 304 and 305. Hence, this is Mitchie M's most notable song, and one of Miku's most notable songs.