The routine featured a police officer kneeling on lead dancer Ashley Banjo and the group taking a knee.
Amanda Holden, Piers Morgan, Davina McCall and Dermot O'Leary have also paid tribute to the comedian.
The pair came close to quitting the ITV talent show in 2012, as they were unhappy with how little of them was being shown on screen.
From Jules and Matisse’s switcheroo to Susan Boyle’s turbulent times.
Connie Talbot, Faryl Smith, Stavros Flatley, Ronan Parke and more: they're all grown up.
From Susan Boyle's first audition to the judges getting egged.
The Britain’s Got Talent judge, radio host and actress took life to the next level this year.
"I think BGT has some explaining to do," one viewer tweeted.
Our entertainment team round up this week's highlights, featuring the impending end of Fleabag series two, BGT's return and who is going down in this week’s Celeb Stock?