The music industry was doubly shocked yesterday when first, no mention was made of Metallica and their ongoing efforts to lose as many of their fans as possible.  But even more alerting than this were the shockwaves that were felt when the news came out that the Chieftains, a famous Celtic-music band on Europe finally caved in and, in a public statement, revealed that they are, in fact, Derek Sonderfan.  "It just seemed right to us at this point in our career," said front-man Derek Sonderfan, "That we just confess to our fans that we are not a diverse and large group of Celtic performers (including a girl) but rather one guy who doesn't know an awful lot about the Celtic heritage.  We figured this shock might ultimately boost record sales."  No word yet as to whether or not this had boosted record sales.