That really IS live. No autotune either. When was this? His vocal is way out of tune here and there and that is perfectly ok. In fact I love it. I very much prefer this to the pre-recorded/autotuned robotic, 100% perfectly executed vocal performances.
I always mention it when I hear Don sing live, but clips like this (if this is recent) prove that he COULD sing live, if he didn't want so badly to be a spot-on, perfect singer every night.