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Freelance web developer Iain Mullan has developed a map mashup titled "Johnny Cash Has Been EVERYWHERE (Man)!" [iainmullan.com].

The concept is simple yet funny: using a combination of an on-demand music service, an online lyrics catalog and some Google Maps programming magic, all the cities mentioned in the song are displayed simultaneously as they are mentioned during the song, as performed by Johnny Cash.

Via @datatelling.