R.J. Mischo - Blues Harp Meltdown  - You Messed Up -  Mark Hummels Blues Harp Meltdown (2008)
James Harman - Helsinki Laundromat Blues - Mark Hummels Blues Harp Meltdown (2008)
Billy Branch and Gary Smith  - Blues keep following me  -  Blues Harp Meltdown - Mark Hummels Blues Harp Meltdown (2008
Rick Estrin – You gonna need my help - Mark Hummels Blues Harp Meltdown (2008
Kim Wilson -  Don't Lose Your Eye - Mark Hummels Blues Harp Meltdown (2008
Gary Moore – Midnight Blues 
Z.Z. Top – Blue jean Blues
Stevie Ray Vaughan - The Sky Is Crying