YouTubeが「Call Me Maybe」を歌う (feat. PewDiePie, Smosh, Jenna Marbles, Nigahiga, Tobuscus, ERB, PSYなど) (Youtube Sings Call Me Maybe (Ft. PewDiePie, Smosh, JennaMarbles, Nigahiga, Tobuscus, ERB, PSY, etc.))