Simon Cowell's extensive use of Botox and fillers has left him with a permanently 'sad' facial expression, while Madonna's ‘creasing eyelids' show her age, cosmetic surgery experts have claimed in a new Channel 5 show.

The A-listers' years of cosmetic work will be examined during Celebrities: What's Happened to Your Face?

on Thursday, with experts comparing photographs from the past two decades and weighing up the impact of natural ageing versus enhancement. 

Music mogul Simon, 61, who previously joked about 'using too much Botox', is said to have suffered some 'volume loss in his forehead', which has caused his appearance to change. 

Dr Sarah Tonks, from The Lovely Clinic, says on the show: 'Now it looks like an attempt has been made to soften the wrinkles and lines around his eyes.

The two things together here have given this really sad appearance.'

The experts also suggest Madonna, 62, has used 'too much' filler in her cheeks to help maintain a 'youthful lift' - although cosmetic surgeon Mr Alex Karidis insists the pop princess' 'crepey eyelids unfortunately portray her actual age'.

Examination: Simon Cowell's extensive use of Botox and fillers has left him with a permanently sad facial expression, surgery experts have claimed in a new show (pictured left in 2001 and right in 2019)

Meanwhile Madonna's ‘creasing eyelids' show her age, cosmetic surgery experts claimed.

Pictured, the singer in 1985, left, and in 2018, right

Mr Karidis explained: 'You can see that the skin at the top of the eyelid is very, very crepey like.

'You can fill up the cheeks, you can lift up the jawline, you can fill up the neckline but if the skin around the eyes is looking a little crepey and creasing that's going to portray your age unfortunately.

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'The likelihood and probability that Madonna has had some surgery is very high because unquestionably once you get over 50, no amount of non surgical treatments is actually going to reverse some of the sagging and laxity that comes on naturally.'

Several of the experts interviewed commented on the singer's wrinkle-free forehead, claiming that it couldn't have happened naturally - despite Madonna previously saying she isn't keen on cosmetic procedures.

Cosmetic doctor Dr Zoya Diwan commented on Madonna's 2018 appearance to the MTV Video Music Awards in New York City, compared to her earlier looks.

Madonna's extremely youthful appearance at the 2008 (pictured) Cannes Film Festival, when she was aged 50, was also highlighted by the experts 

'She's putting more and more filler in her cheek to help maintain that lift,' claimed the doctor.

'But you can see actually that these folds are getting deeper and she's trying to fill that more to prevent them sagging down.

'And I think that essentially is making her look a little too filled in that region.'

Madonna's extremely youthful appearance at the 2008 Cannes Film Festival, when she was aged 50, was also highlighted by the experts.

They praised the contouring of her face and suggested that her flawless skin could've been down to cosmetic surgeons at the top of their field.

Meanwhile, Simon Cowell's looks were also called into question, with Dr Sarah Tonks suggesting his 'tweakments' have given him a 'permanently sad' look.

The experts suggest Madonna (pictured in 1986, left, 광주 성형외과 and right, in 2011), 62, has used 'too much' filler in her cheeks to help maintain a 'youthful lift' - although cosmetic surgeon Mr Alex Karidis insists the pop princess' 'crepey eyelids unfortunately portray her actual age'

'He's got some volume loss in his forehead on both sides which is not helping his brow position because the bigger your volume loss in your forehead, the lower your brows will be. At 46 there's not a line on his forehead.

Not one line,' she said.

'He's either had a very stress-free life or there's some Botox in there. Maybe he's had filler in the jawline, 광주 성형외과 maybe he's had his face lifted at this point. After keeping up the Botox jabs, by 2012 his eyebrows have started drooping.'  

Leading surgeon Dr Alex Karidis claims the X Factor star began to age naturally in his mid-thirties, before suspecting he 'overdid' his treatments to combat 'natural sagging in his cheeks'. MailOnline has contacted Simon's representatives for further comment. 

Cowell is also estimated to have spent up to £50,000 on his 'ultra bright' Hollywood smile, with veneers that one expert are 'probably off the whitening scale'.

Dr Guy Barwell, a dental surgeon at The Implant Centre Hove & Haywards Heath previously told Cowell is also estimated to have spent up to £50,000 on his 'ultra bright' Hollywood smile, with veneers that one expert are 'probably off the whitening scale' (pictured left in 1994 and right in 2020)