Question: Who sings get it on bang a gong?
Disambiguated questions and answers: question: Who is the group sings get it on bang a gong?
Who is the individual sings get it on bang a gong?
answer: T. Rex
Bill Legend, Mickey Finn, Marc Bolan, Steve Currie
Natural Questions answer: T. Rex (from the Wikipedia article "Get It On (T. Rex song)")