By Sarah Tetteh Dame Joan Collins has opened up about the secret of staying so young at the age of 90. The Hollywood icon stole the show at the Variety Club Showbiz Awards at the Londoner Hotel on Tuesday. She looked elegant in her chic black dress as she took to the red carpet. Guests bid to go on a lunch date with her as they raised money for transportation for children with disabilities. As she oozed glam at the plush event with celebs including James Corden, Amanda Holden and Sir Andrew Lloyd Webber – guests all had one question for the showbiz queen. Just how did she stay so young looking…

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