DOUBLE TROUBLE: Arnthor Birgisson, Rami Yacoub, Savan Kotecha.
NIRVANA: Theron Makiel Thomas, Scott Harris Friedman, Dr. Luke, Sarah Theresa Hudson, Rocco Valdes, Katy Perry, Aaron Joseph, Dallas James Koehlke, Vaughn Richard Oliver, Emily Warren, Keegan C Bach, Ryan Ogren.