Barnes joins a long list of celebrities including cricket star Brett Lee, The 7pm Project's Carrie Bickmore, astounding recording artist Mark 'Diesel' Lizotte, Masterchef's George Colombaris along with some of Australia's finest designers such as Arabella Ramsay, Seafolly, Yeojin Bae, Mimco, and many more.

The singlets will be auctioned off in a bid to raise funds for the 2010 Royal Children's Hospital Good Friday Appeal.

Last year the Good Friday Appeal raised a total of $13,862,734.00 for the Royal Children's Hospital in Melbourne. Each year, the online auction raises over $100,000. All items are donated and 100% of the money goes to the kids.

To find out more about the Good Friday Appeal or want to make a bid, please visit the website Goodfridayappeal.com.au