Break the Ice was already recorded tho. She was just singing the adlibs which don't require strong vocals.
She barely even does that for any of her new songs tbh.
Not true, she was recording the first take of the song during this video. There's even an Early Demo featuring these vocals, she later re-recorded the verses as we hear them in the final mix
But the chewing of the cheetos or ice seemed kinda faked...Was another person doing it for her 