Olivia and Lily addressed an iconic song to the Supreme Court Justices.
He also paid tribute to frontline and NHS workers after their sacrifices in the pandemic.
'This is a truly special moment for me.'
The former EastEnders star pops up in the second half of tonight's episode.
'Do you not let them drag us another inch closer to the edge.'
‘I went to the side of the stage and I passed out,' the singer remembered.
He also insisted an 'endless churn' of allegations is 'driving people nuts'.
The competition 'celebrates the imperfections that make all dogs special and unique'.
They are one of several Ukrainian acts in this year's line-up.