You can vote for 1 to 4, the top 4 from each group go through. The final 4 groups have 9 contestants instead of 8, to compensate for the extra group in the first round. Enjoy the negativity!
Imagine the lad who serenaded Dua Lipa at glastonbury breathing a sigh of relief that the internet had finally forgotten about him. Only to be advised that he had won the award for the shittest solo act ever