Does Nick Jonas wear a hearing aid?

yes hes had bad hearing Other Answer: No...I never heard of him having "bad hearing"...on stage, he wears ear plugs because it's so loud on there. Maybe that's what you're thinking of?

Other answer:

Many performers wear in-ear monitors to hear their own singing and/or the sound of the music. I have never seen a Jonas Bros. concert, but if it looks like a hearing aid, that's probably what it is. Link: http:/en.wikipedia.org/wiki/In-ear_monitor