20 acts that can't be missed, from the Boss, Byrne and Phish to Bon Iver, Santigold and MGMT
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"For Emma, Forever Ago" made it to the top of many 2008 Best-Of lists (ahem) and Bon Iver a name on musical tastemaker's tongues. Follow-up EP, "Blood Bank" debuted in the top 20 of the Billboard 200. Though technically a band, the other musicians help realize the musical vision of Justin Vernon. Be prepared to sing-along. Vernon likes that.