The trouble with putting together a tribute album to a highly respected artist using contributions from musicians inspired by him or her is that the resulting reinterpretations are often too darn reverential to be anything but bland. So while it’s nice that Prince, Björk, Emmylou Harris, Annie Lennox, Sarah McLachlan, Elvis Costello and others have taken time out from their busy schedules to croon their favourite Joni tunes, there’s nothing particularly inventive or even halfway exciting here. Does anyone really need to hear James Taylor sleepwalk through River or k.d. lang mimic Mitchell’s every inflection on a horribly misguided attempt at a note-for-note recreation of Help Me? After Sufjan Stevens’s bubbly opening swing through Free Man In Paris, it’s all downhill. On the upside, maybe the lame covers caused Mitchell to reconsider her self-imposed studio exile. She’s recording again.