By DAILY MAIL REPORTER Droopy: Britain's Got Talent fans were quick to point out Simon Cowell's wilting eye and a small bruise by his cheekbone. Right, as he usually looks He admits being vain, so perhaps Simon Cowell should avoid watching any repeats of Britain’s Got Talent. Millions of viewers were shocked by the music mogul’s drooping left eye during the live semi-finals of the ITV show on Monday night – thought to be caused by Botox treatment.It was the first time Cowell, 51, had been seen on British TV since the X Factor final in December, and fans were quick to point out his wilting eye and a small bruise by his cheekbone. Homecoming: Cowell joined judges for the Britain's Got Talent semi-final A show source said: ‘Simon had overdone things a little with the Botox and it soon showed up on camera – especially as we film in high definition, which is particularly unforgiving. 'During the break between shows, the producers were quick to change the lighting over the judging panel. 'Simon was not happy.’ Exasperation: Cowell and the BGT judges. Cowell once described Botox as 'no more unusual than toothpaste'One Twitter user wrote: ‘Whoever did Simon Cowell’s Botox wants sacking. Droopy left eye lid and bruising!’Plastic surgeon Rajiv Grover said: ‘There can be noticeable sagging around the eyes and brow area in older men if Botox is used, because they have heavier brows which tend to sag before many women.’Cowell once described Botox – which is injected into the face and forehead to relax frown lines – as ‘no more unusual than toothpaste’. Monster moobs: Simon Cowell showed off his man boobs with a shirt almost open to his navel at the Britain's Got Talent semi-finals yesterday Chest awful: The head judge appeared to think he'd nailed his look, however, and gave waiting fans a 'V for victory' sign as he had a cigarette outside the studios Earlier Cowell took his manly display of chest a few buttons too far on outside the BGT studios.The star had unbuttoned his white shirt under his pale grey suit almost to his navel to show off his he-vage - male cleavage - in a style so Seventies all that was missing was a medallion.Cowell displayed his macho man look outside the BGT studios as he enjoyed a cigarette with ex girlfriend Jackie St Claire, 52. source: dailymail
