Biography
Megurine Luka (巡音ルカ) and Kamui Gakupo (神威がくぽ) are both characters from the VOCALOID computer program released by Crypton Future Media. They have had several duets together, such as GGRKS (alternatively known as Go Google It or Google It You Moron), as well as covers of songs such as Romeo & Cinderella and Cendrillon.
Biography text from Last.fm, available under CC BY-SA.