Meanwhile, we’re told how beauty billionaire Kylie has unexpectedly found herself battling the green-eyed monster when it comes to Sydney’s rising reputation as having ‘the best boobs in Hollywood’. An insider says, ‘Kylie is very obviously threatened by Sydney, anytime her name comes up she gets this sour look on her face. Not that it’s easy to block out Sydney, she’s everywhere right now, which is only making Kylie more annoyed. Kylie was just nine when KUWTK first premiered back in 2007, with he now cult reality show making the entire clan global household names. By 21, Forbes had declared Kylie the youngest self-made billionaire, even going as far to eclipse her sisters’ own fortunes.