I Know I Know.855,827 Views SingerHatsune MikuVocaloidProducerYoshida YasseiProducerViews BreakdownYouTube730K ViewsNiconico126K ViewsDaily Views2K12/172K12/182K12/192K12/202.2K12/212.2K12/222K12/23VideorefreshRefresh Song DataListenYouTubeNiconicoVocaDB