Jennifer Hudson is on the Today show this morning (08/19/14) and is using purple molds with glitter while on stage.  I notice most music acts do have earmolds in. How much is a matter of helping then understand their accompaniment over the crowd noise and how much is to protect their ears from too much sound I don't know.
				
			
				
oh the echoes and stuff, I see...
 for the ideas on that