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Simon Cowell displays his 20Ibs vegan diet weight loss in trademark tee and baggy jeans as he arrives at America's Got Talent filming

Daily Mail logo Daily Mail 6 days ago Jason Chester for MailOnline

The image overhaul took center stage once again as Simon Cowell made his latest appearance on America's Got Talent. 

The talent show mogul, 59, revealed his impressive 20-pound weight loss, the result of a strict vegan diet, while posing for photos at Hollywood's Dolby Theatre on Tuesday evening. 

Sporting a loose fitting V-neck T-shirt and baggy jeans, Cowell appeared to be in high spirits as he prepared for his latest appearance on America's Got Talent. 

Simon Cowell holding a sign posing for the camera: Here he is: The image overhaul took centre stage once again as Simon Cowell made his latest appearance on America's Got Talent © Provided by Associated Newspapers Limited Here he is: The image overhaul took centre stage once again as Simon Cowell made his latest appearance on America's Got Talent

Flashing a smile, Cowell also revealed his newly whitened teeth - although their former brilliance appeared to have simmered down over recent days.

The popular TV personality has been enjoying a new lease of life since trimming down, and his new look hasn't been lost on former colleague Sharon Osbourne. 

She told The Sun: 'The teeth are too white again, he always gets these teeth that are too white and it takes a year or so for the color to calm down.

a close up of a sign: Trim: The talent show mogul revealed his impressive 20Ib weight loss, the result of a strict vegan diet, while posing for photos at Hollywood's Dolby Theatre on Tuesday evening © Provided by Associated Newspapers Limited Trim: The talent show mogul revealed his impressive 20Ib weight loss, the result of a strict vegan diet, while posing for photos at Hollywood's Dolby Theatre on Tuesday evening 'Otherwise I think he looks great., he's dropped weight and it's great for him.

Simon Cowell smiling for the camera: Hard to miss: Flashing a smile, Cowell also revealed his newly whitened teeth - although their former brilliance appeared to have simmered down over recent days © Provided by Associated Newspapers Limited Hard to miss: Flashing a smile, Cowell also revealed his newly whitened teeth - although their former brilliance appeared to have simmered down over recent days 'Much healthier for him, not that he was big but he just got rid of that tummy and chest.'

Trim: The talent show mogul revealed his impressive 20Ib weight loss, the result of a strict vegan diet, while posing for photos at Hollywood's Dolby Theatre on Tuesday evening © Provided by Associated Newspapers Limited Trim: The talent show mogul revealed his impressive 20Ib weight loss, the result of a strict vegan diet, while posing for photos at Hollywood's Dolby Theatre on Tuesday evening Cowell shocked America's Got Talent viewers when he showed off his slimmer frame last month, and he recently revealed the real secret behind his weight loss.

He told Closer Magazine: 'People have said: "Oh, he's had a gastric band fitted" - but I haven't. If I had, I would admit to it. This diet is all about what you put into your body.'

Simon Cowell holding a sign: Upbeat: Sporting a loose fitting V-neck T-shirt and baggy jeans, Cowell appeared to be in high spirits as he prepared for his latest appearance on America's Got Talent © Provided by Associated Newspapers Limited Upbeat: Sporting a loose fitting V-neck T-shirt and baggy jeans, Cowell appeared to be in high spirits as he prepared for his latest appearance on America's Got Talent Instead, the music mogul listened to expert advice from a doctor in Los Angeles who sought to change Cowell's appalling diet.

He explained: 'I met this doctor in LA and he told me my diet was appalling and I had to cut out fatty foods and certain drinks.

Simon Cowell smiling for the camera: Helping hand: The music mogul listened to expert advice from a doctor in Los Angeles who sought to change Cowell's appalling diet © Provided by Associated Newspapers Limited Helping hand: The music mogul listened to expert advice from a doctor in Los Angeles who sought to change Cowell's appalling diet

'I could see the difference. Cutting out sugar made a massive difference. The first few weeks were difficult, but then I actually stopped craving sugar. 'I had also found a brilliant gluten-free beer, which helps.'

Simon had previously ditched junk food and adopted a vegan diet following a health scare almost two years ago when he fell down the stairs at home in the middle of the night.

He said at the time: 'Within 24 hours I changed my diet and I've not looked back since. You feel better, you look better.

'I cut out a lot of the stuff I shouldn't have been eating and that was primarily meat, dairy, wheat, sugar -- those were the four main things.' 

Related video: Fans flip out of Simon's new look (via Yahoo Entertainment)

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