Answers

2015-05-22T12:54:40+05:30
I THINK BECAUSE THEY HAVE TO SING A CROWD AND MANY ROCK BANDS AND MUSICAL INSTRUMENTS SO THEY MAY NOT ABLE TO HEAR THEIR OWN VOICE.

THATS WHY IN ORDER TO LISTEN TO THEIR VOICE FOR PROPER LYRICS THEY PUT HAND ON THIER EARS
0
2015-05-23T11:33:29+05:30
I think that it is because that the dont go wrong with the lyrics or tune because of the noise of the crowd .
0