At least X and J have voices for oversinging. When Kelly Clarkson tries to oversing...all that comes out is shrills and screeches, like from some horror movie!
As much as I love Xtina, she's the guiltiest. When she restrains, she's soooo good.
But when she does oversing, oh my god. I just can't. I also hate her interjections (ha!), especially when she's singing a heartfelt ballad. I want to slap her...