immersed Bruno Mars, Bonnie McKee, Pharrell Williams, BC Jean, Pink, Ke$ha, Lady Gaga, Rihanna, Sam Sparro, Ferras, Sasha Mallory, Sutan Amrull (AKA Raja), Brad "Cheeks" Bell, Cassidy Haley, Alessandra Torresani, Alisan Porter, Juliet Simms, Audrina Patridge, Colton Haynes, Katharine McPhee, Megan Hilty, Kris Allen, Allison Iraheta, Danny Gokey, Joanna Pacitti, Jamar Rogers, Haley Reinhart, Carly Rae Jepsen, Robin Thicke, Paula Patton, Madonna, Nicole Scherzinger, Britney Spears, Tommy Joe Ratliff, Isaac Carpenter, Brian London, Ashley Dzerigian, Brian May, and Roger Taylor