The father-of-two admitted he was nervous going into the audition, which will be revealed on Sunday.
Stan Walker shot to fame after winning Australian Idol back in 2009.
The 26-year-old beat Hayley Warner, who went on to become a successful songwriter in Los Angeles.
Stan has gone on to have a long and successful career since wowing on the talent competition eight years ago.
The handsome Kiwi has racked up hits like Black Box and Music Won't Break Your Heart.
He's also moved into acting, starring in the films Hunt for The Wilderpeople and Born to Dance.
He also worked as a judge on The X Factor New Zealand for two years.