Singer songwriter Joni Mitchell is in intensive care after been found unconscious at her home in Los Angeles.

The iconic Canadian-born folk singer, based known for her song 1970 Big Yellow Taxi, was taken to hospital but was said to have regained consciousness in the ambulance ride over.

The 71-year-old revealed in December she had been diagnosed with a rare skin condition called Morgellons Disease which effectively put an end to her performing career.

A statement on Mitchell's official website said: "Joni was found unconscious in her home this afternoon. She regained consciousness on the ambulance ride to an LA area hospital. She is currently in intensive care undergoing tests and is awake and in good spirits.

"More updates to come as we hear them. Light a candle and sing a song, let's all send good wishes her way."

Los Angeles emergency services said they received a 911 call in Bel Air, where Mitchell lives, and a patient described as being in a "fair condition" was taken to hospital, but provided no further details.

Mitchell has received eight Grammy Awards, including a lifetime achievement award in 2002 during her career. She was also inducted into the Rock and Roll Hall of Fame in 1997.