Ian Dickson
饰：Himself - Judge
Kyle Sandilands
饰：Himself - Judge
Tim Farriss
饰：Himself - Guest Mentor
Chelsea Gibson
Chelsea Gibson
饰：Herself
扎克·埃夫隆
Zac Efron
饰：Himself
Suzi Quatro
饰：Herself
Dylan Yeandle
Dylan Yeandle
饰：Himself - Contestant
Natalie Zahra
饰：Herself
莱昂纳尔·里奇
Lionel Richie
饰：Himself - Guest
Christina Amphlett
饰：Herself - Guest
Jackie O
饰：Herself
James Morrison
饰：Himself
丽亚·米雪儿
Lea Michele
饰：Herself - Audience Member
Wes Carr
饰：Himself
Cleonie Morgan-Wootton
饰：Herself
Axle Whitehead
饰：Himself
娜塔莉·巴辛思韦特
Natalie Bassingthwaighte
饰：Herself - Guest
米卡
Mica Mika Penniman
饰：Himself
杰梅因·杰克逊
Jermaine Jackson
饰：Himself - Guest Judge
斯坦·沃克
Stan Walker
饰：Himself
乔丁·斯帕克斯
Jordin Sparks
饰：Herself
James Mathison
James Mathison
饰：Himself - Host
Rebekah LaVauney
饰：Herself
Nandy McClean
饰：Herself
Shane Jenek
饰：Himself
柯瑞·蒙特斯
Cory Allan Michae
饰：Himself - Audience Member
Kasey Chambers
Kasey Chambers
饰：Herself
韦恩·霍普
Wayne Hope
饰：Himself
Daniel Wakefield
饰：Himself
Nathan Brake
饰：Himself
Roshani Priddis
饰：Herself
黛尔塔·古德瑞姆
Delta Goodrem
饰：Herself
米克·莫利
Mick Molloy
饰：Himself
珍娜·乌什克维兹
Jenna Ushkowitz
饰：Herself - Audience Member
本·埃尔顿
Ben Elton
饰：Himself
Bree Amer
Bree Amer
饰：Herself
盖·塞巴斯蒂安
Guy Sebastian
饰：Himself
希拉里·达夫
Hilary Duff
饰：Herself - Guest Performer
Bob Franklin
饰：Himself
Ricki-Lee Coulter
饰：Herself - Host
Prinnie Stevens
饰：Herself
Hayley Jensen
饰：Herself
Ryan Sheppard
Ryan Sheppard
饰：Himself
克里斯·布朗
Chris Brown
饰：Himself
Marcia Hines
饰：Herself - Judge
Angie Narayan
饰：Herself
妮基布朗斯凯
Nikki Blonsky
饰：Herself
卡玛尔
Kamahl
饰：Himself
安伯·莱利
Amber Patrice Riley
饰：Herself - Audience Member
Lee Harding
饰：Himself
蒂娜·艾莲娜
Tina Arena
饰：Herself - Guest Judge
迪安娜·阿格隆
Dianna Agron
饰：Herself - Audience Member
马克•塞灵
Mark Wayne Salling
饰：Himself - Audience Member
朱迪斯·露希
Judith Lucy
饰：Herself
迈克尔·布雷
Michael Steven Bublé
饰：Himself
Alex Longstaff
饰：Herself
Adam Noll
饰：Himself
Bonnie Lythgoe
饰：Herself
马修·莫里森
Matthew Morrison
饰：Himself - Audience Member
Daniel Belle
饰：Himself
金·库珀
Kim Cooper
饰：Herself
Gary Eck
饰：Himself
Matt Lee
饰：Himself
辛迪·劳帕
Cyndi Lauper
饰：Herself
Jennifer Pearl
饰：Herself
乌利·拉图基孚
Uli Latukefu
饰：Himself
Ricky Muscat
饰：Himself
Brielle Davis
饰：Herself
乔尔·麦登
Joel Madden
饰：Himself
Peter Helliar
饰：Himself
Casey Donovan
饰：Herself
Kelly Cavuoto
饰：Herself
Tim Bailey
饰：Himself
Carl Riseley
饰：Himself
Mike Goldman
饰：Himself
凯莉·克莱森
Kelly Clarkson
饰：Herself - Guest
Brandon Burns
Brandon Burns
饰：Himself
克里斯·艾塞克
Chris Isaak
饰：Himself - Guest Judge
瑞贝尔·威尔森
Rebel Wilson
红粉佳人
Pink
饰：Herself
Shannon Noll
饰：Himself
本基·马登
Benji Madden
饰：Himself
简·林奇
Jane Lynch
饰：Herself - Audience Member
Kate DeAraugo
饰：Herself
阿玛莉·沃德
Amali Ward
饰：Herself
安德鲁·古斯伯格
Andrew Günsberg
饰：Himself - Host
Chanel Cole
饰：Herself
Darren Hayes
饰：Himself - Guest Judge
Katie Noonan
饰：Herself - Guest
凯文·麦克哈尔
Kevin Mchale
饰：Himself - Audience Member
John Foreman
John Foreman
饰：Himself - Musical Director
Natalie Gauci
Natalie Gauci
饰：Herself
杰西卡·麦尔白
Jessica Mauboy
饰：Herself
小哈利·康尼克
Harry Connick.Jr.
饰：Himself
Lisa Mitchell
饰：Herself
Damian Noll
饰：Himself
Anthony Callea
饰：Himself
Glenn Robbins
饰：Himself
Guy Mutton
饰：Himself
约翰尼·纳什维尔
Johnny Knoxville
饰：Himself
丽莎·明内利
Liza Minnelli
饰：Herself
Cosima DeVito
饰：Herself
布莱恩·尼古拉斯·麦克法丹
Brian McFadden
饰：Himself - Guest Judge
Maya McClean
饰：Herself
奥莉维亚·纽顿-约翰
Olivia Newton-John
饰：Herself
迪恩·盖耶
Dean Geyer
饰：Himself
Lavina Williams
饰：Herself
Kirk Pengilly
饰：Himself - Guest Judge
Courtney Murphy
饰：Himself
杰·瑞恩
Jay Ryan
饰：Himself
彼特·温兹
Peter Wentz
饰：Himself
Demetrius Savelio
饰：Himself - Guest
克里斯托弗·保罗·柯尔弗
Christopher Paul Colfer
饰：Himself - Audience Member
Lady Gaga
Stefani Joanne Angelina Germanotta
饰：Herself
Paulini Curuenavuli
饰：Herself
Damien Leith
饰：Himself
Erana Clark
饰：Herself - Vocal Coach
Leah McLeod
饰：Herself - Host
Mark Holden
饰：Himself - Judge
Joel Turner
饰：Himself
Vanessa Amorosi
饰：Herself
Bobby Flynn
饰：Himself
Emily Williams
Emily Williams
饰：Herself