"When we were young Toni was one of those people that never had anything bad to say about anyone, she was super girly, laidback and fun, which I loved," Hourigan said.
"I remember just laughing and giggling with her all the time about nothing. She was a beautiful girl that will definitely always be remembered - especially for that smile."
Kelly, in her 20s, was originally from Dargaville. It is understood she was overseas as part of a teaching programme.
Her sister Stacey Kelly took to Facebook to thank people who had pledged money via the Givealittle page: "I just wanna say thank you from the bottom of my heart for the endless support so far.
"Also a huge thank you to the girls who thought of & created this beautiful page for our baby girl.
"We are completely lost for words & can't wait to be home."
Aunt Sharon Kelly said Toni's parents were "devastated beyond words".
"My Niece sadly past away … a awful accident," she said on Facebook.
"Will be sadly missed by all....Toni she was a happy sweet caring young lady full of life."