NO he doesn't deserve all this criticism. He SANG some of that song - listen to how 'speakers blow' sounds on the recording and how it came out of his mouth last nite. I respect him for not bothering to give these snarks credibility by defending himself.
He belted it out 6 months ago on the AMAs. And he belts it out live. And yes, why a double standard for CB when plenty others lip synch.

I'm fine hearing his music and watching fly and pound the dance floor - I JUST WANT SOME NEW CHOREOGRAPHY!