Anyone who doesn't acknowledge that Nicole has one of the best voices in the game is delusional, IMO. Not only are her vocals incredibly robust and emotive, but she has a truly astounding range. She can project and sustain a note way better than people like Xtina. One need only listen to Killer Love.
Just rewatched and -- Holy **** -- those notes are incredible. I'm still distraught Cheryl won't be on X-Factor but thank God her replacement is Nicole.