The 25-year-old said she and fiancé Greg, 29, want something like Mark and Michelle's lavish nuptials, which took place in May.
Speaking to Star magazine, Billie said: "Michelle looked amazing. Her and Mark's wedding is similar to what we'd like.
"I haven't tried a single thing on! I don't want a meringue. I want something quite elegant – quite fitted and sleek."
But Billie and Greg – parents to daughter Nelly – aren't rushing their wedding planning.
She continued: "We haven't actually found a venue yet. We're so indecisive!
"But as soon as we find the right venue, we'll set a date."
Broker Greg popped the question while he and Billie were on their 'babymoon' in The Maldives in February last year.
The cute couple announced the news with a snap of the beach, showing the words 'We're engaged' carved into the sand.