Who is Chorus?

This was the episode which happened when Shah and I were returning from Bake Magic to the Hostel. We were in a mini-taxi and discussing about music and various singers. Suddenly, Shah decided to shoot a question. I said okay and then he asked this:
babai. naaku chaala mandi singers voice telusu. but ee Chorus gaadu evadu ra babu?
I waited for his question to complete and then he went on.
anni paatalu veedey padestaadu.. chaala languages lo kooda paadutaadu.. appudappudu female voice lo kooda paadutaadu.. veedu male aa leka female aa?
(Translation: I know a lot of singers, but who is this chorus dude. He sings most of the songs and he also sings in many languages. Sometimes, I hear a female voice of him too. Is he a male or a female?)
At that moment, I was in a state of silence and was about to burst with laughter. For a moment, I thought if it was a test, but realized that it cannot be possible with Shah at the other end. I couldn't stop my laugh for a while and then explained who Chorus was!