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It's the rags to riches story every girl dreams of!

After seeing the first pix that X17online brought you of Mezhgan Hussainy's ginormous engagement ring, we thought we'd show you how dramatically different the (former?) makeup artist's life is about to become.

First of all, her fiance is worth a cool $200 mill. That rock on her left hand is thought to be 6 carats, and an estimated $750,000 -- which is the same price as the three bedroom house her parents live at in the Valley! The Beverly Hills mansion that she'll be living in is almost thirty times that cost, at $22 million.

Add to that the new deal Cowell struck with Sony that gives him back the rights to the X Factor and Britain's Got Talent, and Hussainy could be sleeping with a billionaire before long!

She's definitely movin' on up! Not a bad journey for a girl who's been dating Cowell for less than a year!