The 27-year-old singer will be featured on an episode as her boyfriend and former Home And Away actor Tai Hara announced the news on Instagram.
"So excited to see my stunning/stupidly talented wife blow @americanidol away tonight with a little taste of down under! @abcnetwork," he captioned a snap of Fely before the judges.
While it is not yet known how far along she is in the process, 29-year-old Fely found great success on The Voice Australia when Ricky Martin was her judge in 2014. The star is also known for her role as singer and actress in popular kids TV show Hi-5.
Good luck, Fely!