ELO version (original) is of course excellent... but for all the people criticizing sharply, remember ELO was one group, they wrote and practiced the song. These guys are many groups coming together for a short while, and to say they had to sing and dance AND make the music without instruments, i think it was pretty darn good!
i love the beelzebubs. they're so charming. but the sweet adelaides were just sad. i think it's move impressive when men sing because it's far less common.
Their quirkiness of the bubs has no bearing on their vocal skill which definitely showed itself during the competition. Close your eyes and listen to Sweet Caroline or their Who compilation and tell me they weren't spot on. And at least they could sing a song start to finish without extensively changing it...
@grwood93 - Female quartet bass' just cant get the resonance that the human ear likes. They still killed it none the less. wish a male quartet would of been on here too.