She didn't sound that bad. There were some off sections(mostly the falsetto) and she dodged some notes. The beginning was SOLID.
She just came off a 20 show tour which her voice was mostly great on.
And in 2014 where its pretty clear her voice and live performances have declined and are unpredictable, is this really news or a hot topic? Yes people, All of Mariah's performances are not perfect and she lipsynchs. Get over it. When she's on, Shes ON but people don't seem to pick that up.