Question: Who sings hey mr dj play that song?
Disambiguated questions and answers: question: Which group sings the 1993 song with lyrics hey mr dj play that song?
Which group sings the 1997 song with lyrics hey mr dj play that song?
answer: Zhané
Backstreet Boys
BSB
Natural Questions answer: Train (from the Wikipedia article "Play That Song (Train song)")