The Best Rock & Roll Band Ever
Great Big Sea
Of A Revolution
John Mayer
Dave Matthews Band
Gaelic Storm
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Breaking Benjamin
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Alter Bridge

12 Stones
Marc Broussard
Jack Johnson

Clint Black sums it up pretty well in one of his songs:
Ain't it funny how a melody can bring back a memory, Take you to another place in time, completely change your state of mind.