Dierks Bentley's newest album "Riser" is nominated to win the Best County Album at Sunday's Grammy Awards. Wednesday night, Dierks appeared on The Late Show with David Letterman and performed a fantastic "unplugged" version of the title track of his critically acclaimed album.

Dierks played the acoustic guitar and was accompanied by a bass, fiddle, mandolin and cajon-type percussion box which his bass player manned.  David Letterman was clearly impressed following the performance.

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