Simon Cowell, 63, is compared to a ‘ventriloquist dummy’ by stunned viewers as he introduces controversial winner of BGT at the Royal Variety Show

Simon Cowell has been likened to a ‘ventriloquist dummy’ by a stunned viewer as he made a surprise appearance at the Royal Variety Performance on Sunday.

The music mogul, 63, took to the stage at London’s Royal Albert Hall to introduce a performance by controversial Britain’s Got Talent winner Viggo Venn.

After previously sparking concern from viewers over his radically different appearance, viewers were once again baffled by Simon’s appearance.

Simon has previously denied having a facelift, but admits he regrets his extensive use of Botox.

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Other viewers noted that Simon, with his red-tinted glasses, looked akin to ’80s music legend George Michael.

One posted: ‘Simon Cowell has become George Michael,’ while another said: ‘George Michael Cowell.’

A third posted: ‘Wow Simon Cowell has become George Michael.’

Viggo was crowned the winner of Britain’s Got Talent in June, earning a place on the Royal Variety Show, despite huge backlash from viewers.

After dancing to Daft Punk’s One More Time in a hi-vis jacket for his final performance, there were boos from the studio audience as presenters Ant and Dec announced the comedian as the winner.

Some viewers used the hashtag #CancelBGT as they criticized the results of the public vote on Twitter.

In May, Simon proved he doesn’t mind making fun at his own expense after speaking out about his changing face on Britain’s Got Talent.

During one of the talent show’s live shows, he set tongues wagging and made a cheeky comment across his face.

After previously sparking concern from viewers over his radically different appearance, viewers were again left stunned by Simon’s face.

The surprise move came after one hopeful, Tom Crosbie, impressed the judges by creating Bruno Tonioli’s face from Rubik’s Cubes.

As the end result was shown to the panel, Amanda Holden, 52, took the chance to joke about Bruno, 67, saying: ‘Well, he’s got the orange [face] right!’

“How the hell do you do that?” asked a completely bewildered Simon, as the artist replied: “Practice… it turns out you have a very difficult face to make from Rubik’s Cubes.”

At that point, Simon joked, “I’ll change my face… again.”

In April, Simon insisted he has never had a facelift after presenters Ant & Dec made a cheeky joke about his changing appearance.

At the time, on December 47, he told the audience: “We have a new face on the jury,” to which his comedy partner, also 47, replied: “What? Simon has a new face?’.

Speak with The mirror Simon laughed off the suggestion that he had gone under the knife, despite his drastically changed facial features.

He told the publication: ‘I think it’s hysterical. I mean, it just makes me laugh. I haven’t had a facelift or anything.’

“I’ve had a little Botox or whatever, but nothing drastic,” he added.

“So when I hear about this, it honestly makes me laugh.”

The talent show boss recently revealed he took his love of Botox too far, leaving him looking like ‘something out of a horror show’ after his latest treatment.