Season 21
2010
Episodes
1 Vampire Weekend Jan 9, 2010 
2 Adam Lambert Apr 9, 2010 
3 The Script Apr 16, 2010 4 Trey Songz Apr 26, 2010 6 Phoenix Jun 21, 2010 7 Camila Aug 1, 2010 8 Uncle Kracker Sep 6, 2010 
9 Train Sep 17, 2010 11 B.o.B Oct 2, 2010 12 Steel Magnolia Oct 4, 2010 13 Lykke Li Apr 22, 2011 14 Adele Mar 4, 2011 15 Zoé Mar 22, 2011 16 Los Tigres Del Norte and Friends May 22, 2011 
17 Lil Wayne Jun 12, 2011 
18 Mumford & Sons Jun 24, 2011 
19 30 Seconds to Mars Jul 20, 2011 
20 Kelly Clarkson Nov 18, 2011
2 Adam Lambert Apr 9, 2010 3 The Script Apr 16, 2010 4 Trey Songz Apr 26, 2010 6 Phoenix Jun 21, 2010 7 Camila Aug 1, 2010 8 Uncle Kracker Sep 6, 2010 9 Train Sep 17, 2010 11 B.o.B Oct 2, 2010 12 Steel Magnolia Oct 4, 2010 13 Lykke Li Apr 22, 2011 14 Adele Mar 4, 2011 15 Zoé Mar 22, 2011 16 Los Tigres Del Norte and Friends May 22, 2011 17 Lil Wayne Jun 12, 2011 18 Mumford & Sons Jun 24, 2011 19 30 Seconds to Mars Jul 20, 2011 20 Kelly Clarkson Nov 18, 2011