Reparto (por orden de créditos)
Cat Deeley
Self - Presenter
Anastacia
Self - Performer
Tony Audenshaw
Self
Natasha Bedingfield
Beyoncé
Busted
Themselves - Performers
Simon Cowell
Katie Derham
Liz Fuller
Self - Regional Presenter
Girls Aloud
Ronan Keating
Jennifer Lopez
Maroon 5
Themselves - Performer
Chris Martin
Brian McFadden
McFly
Katie Melua
Kylie Minogue
Stephen Mulhern
Paul O'Grady
Orla O'Rourke
Kelly Rowland
Scissor Sisters
Lisa Scott-Lee
Jake Shears
Alastair Stewart
Midge Ure
Louis Walsh
Westlife
Michelle Williams
Will Young
Thaila Zucchi