Happppy song3,074,783 Views SingerKagamine Len V4X (Unknown)VocaloidProducerSOOOOProducerViews BreakdownYouTube2.8M ViewsYouTube272K ViewsNiconico50K ViewsDaily Views1.2K12/1832012/1966712/2080012/211.3K12/22012/23212/24VideorefreshRefresh Song DataListenYouTubeNiconicoVocaDB