Hmmm why was it then when they were coming to the stage only one was singing but it sounded like a range of vocals were being sung. Similar happened when on the stage. Are they now got backing tracks on?

i mentioned this in the live show thread last night

two of them were holding their mics at their waist with only one with his mic anywhere near his mouth but what we heard was all three singing

there were 5 or 6 of the acts that were blatantly miming, a couple were really out of sync between their lip movements and the vocals and you could hardly hear what they were meant to be singing because the backing vocals were so loud

I think that most of the acts had backing tracks.

they do