According to KT Tunstall, the best Scottish chips have a lot in common with the best songwriters: they're "soggy and crunchy at the same time." World Cafe visited KT in Edinburgh - where the artist was born - the day after a sold-out show featuring songs from her new album, WAX. The record certainly passes the chip test: It has the bite and crunch of a big rock record and the tender heart of a singer-songwriter confessional.

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