After a couple rounds of elimination you have to assume remaining contestants are vocally talented. It's a popularity show so by distinguishing yourself you improve your win.
Considering I prefer furry men, so far Aslan, Bryce, Zion, and the dancers have all been hairless, no way was I letting them mess with his chest. And yes, some misguided individuals still prefer to look like prepubescent boys, same with hair length. Even though Chipper claims hipsters have longer hair, I'd say there's a good number of them sporting high and tights.
You're breaking the rules, anyway. Don't you know your supposed to keep your eyes above the neck in the locker room?