Drake Bell - August 14, 2007
Corbin Bleu - August 14, 2007
Jordan Pruitt - August 14, 2007
David Cook - June 20, 2008
Justin Bieber - June 20, 2008; November 28, 2012
Matt Nathanson - June 20, 2008
Kevin Rudolf - June 20, 2008
The Veronicas - June 20, 2008
Paul McCartney - August 15, 2009; July 24, 2010; July 16, 2014
The Script - August 15, 2009
Owl City - January 21, 2010
Original Cast of Starship - February 13, 2011
Team Starkid - May 8, 2011; November 8, 2011; June 1, 2012
Charlene Kaye - June 24,…