Canadian songwriting legend Joni Mitchell is in a coma and unresponsive, according to TMZ.
The gossip website reported Tuesday that Mitchell was in hospital with ``no immediate prospects for getting better.''
TMZ reports that Mitchell's longtime friend Leslie Morris filed legal documents to obtain ``conservatorship'' over the Saskatchewan-raised songwriter, because no other close relatives were available.
The 71-year-old Mitchell was admitted into intensive care last month after being found unconscious in her home.
The ``Big Yellow Taxi'' songwriter is a seven-time Grammy winner and a member of the Rock and Roll Hall of Fame.