The youngest members of the list are troubled basketballer Ben Simmons worth $105million (number 57) and tennis player Ash Barty, worth $37 million - up from $28million. Last on the list with a $36million fortune is Stephanie Miller, better known as Steph Claire Smith, whose money comes from co-founding health and fitness app Keep It Cleaner. Tammy Hembrow, 27, has parlayed her 13 million Instagram followers into the Tammy Fit app and is estimated to be worth $38million (number 96). The 31-year-old has 2.5 million Instagram followers and an estimated $63million. Model Natasha Oakley, whose A Bikini A Day blog morphed into her own swimwear range, debuted on the list at number 71.
Kayla Itsines, 30, began her Sweat fitness app business on Instagram in 2009 and comes in at number 39 after amassing $164million as well as 13 million followers.
The 32-year-old blogger's vitamin range JSHealth - developed with husband Dean Steingold - has seen the couple debut on the list with a combined $426million, putting them at number 24 and 25. The boom in health and wellness spending has underwritten the rise of well-known social media influencers including Jessica Sepel. Last on the list with a $36million fortune is Stephanie Miller, better known as Steph Claire Smith, whose money comes from co-founding health and fitness app Keep It Cleaner
