It's the crossover event nobody could have predicted.
The Britain's Got Talent star was met with rapturous applause after making her surprise appearance.
The I Dreamed A Dream singer performed during Sunday night's Britain's Got Talent final.
"I’ve grown up a bit now."
"I never thought I’d see the day when Susan Boyle and Sonic the Hedgehog were on the same bill."
The singer felt it was more important to stay at home in Scotland when the one-off episode was being filmed.
The Britain's Got Talent star showed off her moves in the fabulous clip.
We check in with the likes Lorraine Bowen, Loveable Rogues and Jonathan and Charlotte.
We’re not sure whether we owe the Duchess of Sussex privacy or she owes us exposure, especially when taxpayers’ money is involved, freelance journalist Joanna York writes.
The 58-year-old Britain's Got Talent star observed: "I've a lovely house, why not share it?"