Am always amazed by Jam's versatile voice and his harmonisation skills. He seems to be able to glide effortlessly and add depth to the contestant's vocal. But I hope the contestants will have a chance to do solo during the contest to allow the audience to appreciate their singing on their own merits.
btw, I am impressed by BTV's 1080 versions - very smooth with no intermittent buffering! maybe bcos of low viewership over at youtube?