The Matrix (Korn), Guy Chambers (Robbie Williams, Kylie Minogue, Texas ...), Ryan Tedder (OneRepublic), Red One (Lady Gaga, Enrique Iglesias), Desmond Child (Aerosmith, Bon Jovi, Ricky Martin, Kelly Clarkson, The Rasmus ...), Kevin Rudolf, Kara Dio Guardi (Pink, Pussycat Dolls ...)
