I'm seeing a lot of people question why Demi's mic was so low, & it could've been done that way to appease the other singers (ie: Cece Winans, etc). I remember years ago on a VH1 Divas Special, Mariah Carey & Diana Ross did a duet: it was said that Ross forbade Carey from doing her trademark whistles, out of fear of being overshadowing. Could be something similar? :/