A 30-year old mum-of-four who five years ago gave birth to twins as a surrogate mum for her best friend, has landed a major role as Australian Ambassador for Britney Spears’ new lingerie line, Intimate Britney Spears.

Rosie dreamed of being a model since she was a child, and was recently signed to Mint Management modelling agency to represent the brand. And, aside from modelling for several other brands, this superwoman has penned a number of books about her IVF experience.

“It's a pretty crazy amount to fit in,” Rosie told Daily Mail Australia. “I honestly don't think I could have handled all of this in my twenties, but now I think I'm more resilient and can bring something slightly different to the fashion industry.

“My work ethic is stronger than it was then, too. I know what I need to do when I turn up somewhere, and so I come along and just do it.”

Rosie’s story makes her new career all the more extraordinary. With three kids at just 24, she and her husband had built a multi-million dollar business between them. However, it failed and they lost everything, leaving them to wondering how to get their lives back on track.

However, when best friend Lauren asked Rosie to surrogate for her, she agreed. “After giving birth to two surrogate babies and seeing my friend’s face when they were placed in her arms was just magical and it’s something I will never forget,” she writes on her blog.

Unfortunately, soon after giving birth Rosie developed an infection, which left her with scarring on her uterus. Doctors told her that if she wanted another baby, she’s have to do it fast.

“We had to result to IUI and on the third attempt we were pregnant with our fourth baby,” she wrote. “After a very touch and go pregnancy our daughter was born healthy and happy at 37 weeks.”

However, just three weeks later, the infection resurfaced, with devastating results.

“I had started feeling sick with temperatures and continuous bleeding,” says Rosie. “My gynaecologist discovered a blood clot in my uterus and decided to do another operation. I still wasn't getting better though and two operations later it was decided I needed a hysterectomy."

Now, four years later, Rosie is happy and content, and despite her hardships in the past, she feels grateful for what she has.

“We are happy and healthy,” she writes. “I still and always will have issues with my girly bits and varying degrees of daily pain, but it's nothing I can't handle, I'm just thankful to be here. We realised we didn’t need the big house, fancy cars and nice things to be happy as right now we are the happiest and stress free and “brokest” we’ve been in a long time.  We’ve managed to buy a really old, small house full of character with a big backyard; it’s small but it's ours and we are happy.

You go girl! Such a great example that it’s never too late to follow your dreams. It’s so lovely to see good things happening to someone who deserves it.