As the song continues, some of Australia's favorite celebrities join in—Hugh Jackman, Olivia Newton-John, Keith Urban, Nicole Kidman, and a surprise appearance by Russell Crowe.
Watch the entire star-studded performance
Special thanks to the sponsors who helped make Oprah's Ultimate Australian Adventure possible.
The Oprah Winfrey Show kicks off the 25th season with one of the biggest surprises in Oprah Show history. Oprah surprises 300 lucky viewers with Oprah's Ultimate Australian Adventure!
Take a look inside Oprah's trip to Australia!
In a four-day television event airing January 18-22, Oprah and 302 audience members travel Down Under for Oprah's Ultimate Australian Adventure.