- Sonia Kruger - Self - Host
- Delta Goodrem - Self
- Delta Goodrem - Self - Coach
- Ronan Keating - Self
- Kelly Rowland - Self - Coach
- Kelly Rowland - Self
- Boy George - Self
- Boy George - Self - Coach
- Joe Jonas - Self - Coach
- Guy Sebastian - Self - Coach
- Rita Ora - Self - Coach
- Jason Derulo - Self - Coach
- LeAnn Rimes - Self - Coach
- Kate Miller-Heidke - Self - Coach
- Ricky Martin - Self - Coach
- Ricky Martin - Self
- Benji Madden - Self
- Benji Madden - Benji Madden
- Keith Urban - Self - Coach
- Keith Urban - Keith Urban
- Jessica Mauboy - Self - Coach
- Jessica Mauboy - Jessica Mauboy
- Adam Lambert - Self - Coach
- Adam Lambert - Adam Lambert
- Rachael Leahcar - Herself
- Matt Hetherington - Matt Hetherington
- Mahalia Barnes - Mahalia Barnes
- Aydan Calafiore - Himself - Artist
- Aydan Calafiore - Aydan Calafiore
- Megan Washington - Megan Washington
- Ben Bennett - Ben Bennett
- Ricki-Lee Coulter - Ricki-Lee Coulter
- Darren Hayes - Darren Hayes
- Faustina Agolley - Faustina Agolley
- Ben Lee - Ben Lee
- Ryan Tedder - Ryan Tedder
- Alfie Arcuri - Alfie Arcuri
- Emma Fitzgerald - Emma Fitzgerald
- Stan Walker - Stan Walker
- Mercy Cornwall - Mercy Cornwall
- Anthony J. Sharpe - Anthony J. Sharpe
- Katy Perry - Katy Perry
- Lisa Origliasso - Lisa Origliasso
- Jessica Origliasso - Jessica Origliasso
- Hailee Steinfeld - Hailee Steinfeld
- Jennifer Hudson - Jennifer Hudson
- Noah Cyrus - Noah Cyrus
- Niall Horan - Niall Horan
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