[link to original on tumblr]
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Yester-day I learned the chords and bass part for Buddy Holly's "Tell Me How," which is one of the songs that Colin Blunstone covered on Planes. I've listened to Blunstone's version only twice, so I don't want to go straight into analysis, but I did reference it enough to say with some confidence that it's a half-step above Holly's original key (Bb major instead of Holly's A major).