" I guess you haven't studied Mariah enough!"
Sis, I've watched every live performance there is of Mariah. That end note is LIVE. It was recent too from her Australian concert.
Normally for DFAU performance @3:00 it should be a pre recorded belt then the long note but this time it failed so it force her to sing that part live then continue on the long note till about the almost the end the pre recorded track kicks back in.
And the long note of DFAU actually consist of two long notes layer right next to each other. She did the first big long not completely live this time.
