The former X Factor judge, married to Ozzy Osbourne, has been supporting the music moguls healthy lifestyle but believes he went too far with his teeth.
Speaking to The Sun, the 66-year-old said: The teeth are too white again, he always gets these teeth that are too white and it takes a year or so for the colour to calm down.
Otherwise I think he looks great, hes dropped weight and its great for him. Much healthier for him, not that he was big but he just got rid of that tummy and chest.
Simon, 59, dropped 20 lbs in a dramatic weight loss in the last year after switching to a vegan diet.
The tough judge decided to change his lifestyle after a health scare almost two years ago which had him fall down the stairs at home in the middle of the night.
He told Closer Magazine: 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.
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.
His weight loss and teeth whitening then came with many mixed comments from fans and friends alike.
Comedian Frank Skinner recently compared Simons face to a Slipknot mask.
Speaking to Dave Berry on his Absolute Radio Breakfast Show, he said: I remember Simon Cowell when he had his first face. Ive known him a long time.
The current one is a bit Slipknot. Its actually quite terrifying. It looks like his nose is juggling his eyes. They are at different levels.
A man of his money youd think could get the best plastic surgeon in the world. I think its to do with the power cuts we had recently, I think it was done in darkness. It really is shocking.
If he was born like that youd feel cruel saying it but as hes picked it out of a catalogue of some kind, I presume it was a double spread and there was a fold in the middle.
Well, Simon Cowell as a Slipknot masRead More – Source