It is being held at the Toll yards on Pururu St.
As part of the day, Tianajay's father, Jonathan Klomp, and his sister are going to have their heads shaved as a way of thanking everyone for their support.
There will also be an auction with plenty of local businesses supporting the event.
The auction will take place at 1.30pm with the pair getting their heads shaved just before that.
One of the organisers, Chris Mansel, said they were amazed at how many businesses had supported the fundraiser and they were very grateful.
"It's amazing the amount of people who are so generous. We never thought it would turn out so large."
Mr Mansel said they hadn't put a figure on the amount the event hoped to raise, but instead said "anything is better than nothing".
He said goods kept coming in for the auction, with a huge range of items up for grabs, including vouchers for hair cuts and local tourism attractions as well as beauty vouchers.
The event will go ahead rain or shine with most of the activities under cover.