A Fine Frenzy Sara Bareilles Rachael Yamagata Lily Allen John Mayer Trio Duffy Adele Regina Spektor Stabilo Amy Macdonald Maria Solheim Missy Higgins Fiona Apple Katy Perry Gabriella Cilmi Amy Millan Imogen Heap Erin Mccarley Paramore Kate Voegele Sam Brown Damien Rice Jasmine Thompson Stefanie Heinzmann Automatic Loveletter Amos Lee World Inferno Jack'S Mannequin Jay Brannan Stars Ida Maria Davichi Katie Herzig Gavin Degraw Frank Tovey Kate Miller-Heidke Sucré Jillette Johnson Snow Patrol Matthew Perryman Jones Yael Naim Madcon Brett Dennen Estelle Walk Off The Earth Rufus Wainwright A Great Big World Kevin Coyne Patrick Wolf