This performance by Voqa kei Valenisau was in my opinion lip synced. If you watch the whole song you will be able to tell that lip movements was not in sync with the song. Watch from the beginning, the band member on the far left of the screen joins in late when other back up singers were already ‘singing’.
Also the lead singer on the left makes too many cue signals to the member on the far right. The singer on the right makes eye movements that are not in sync with the singing. His facial expressions says that something fishy is going on.
At the end of the song their expressions shows great relief that the torment is finally over.
What do you think? My lip sync radar is totally on red!