World`s End Dancehall is sung by Hatsune Miku and Megurine Luka.
Hatsune Miku (初音ミク?) is a singing synthesizer application with a humanoid persona, developed by Crypton Future Media. Megurine Luka (ボーカロイド Bōkaroido?) is a singing voice synthesizer. Its signal processing part was developed through a joint research project led by Kenmochi Hideki at the Pompeu Fabra University in Spain in 2000 (the same team that later founded Voctro Labs) and originally was not intended to be a full commercial project.