In reply to Theman.

1"08-1:15 u can tel she is lopping cause she out of sync. These are prerecorded "live" vocals she is lipping to. I think if she can sing this way in a studio she should be singing this way live. Also notice that her background singers are lipping too. The girl on the right with short hair is very noticeable. She is lipping to even Mariah''s parts but no audio is coming out of her throat. This is a MIME show yall!