"It's definitely where I buy most of my clothes all the time in Mot. They had the best stuff and it was always fun bargain hunting with my sister when we were teenagers."
Looking down at her black-and-white polka-dot dress, she said: "I think I got this at an op shop. There's nothing wrong with pre-loved clothes. I love finding great stuff there.
"It's a way of helping out a good cause and getting something for yourself as well."
Thomas will also be supported by singer Gin Wigmore, whose own family experiences with the hospice has motivated her to get involved.
Thomas said she hoped that her contribution as the face for the campaign would see more young people heading into their nearest hospice store.
"I just want to convince the younger people that it's cool to shop here. You can get some top designer stuff for a really cheap price," she said.
All money raised will go to hospices around New Zealand to help in services offered such as medical and nursing care, rehabilitation and bereavement care.
To make an instant donation, go to www.hospice.org.nz
On the web
www.giveitup.co.nz