Happy birthday to Joni Mitchell (Roberta Anderson), born on 7th Nov 1943, Canadian singer, songwriter, 1970 UK No.11 single 'Big Yellow Taxi', 1974 US No.7 single ‘Help Me’. She wrote 'Both Sides Now' a hit for Judy Collins and 'Woodstock' a hit for Crosby, Stills, Nash and Young and Matthews Southern Comfort. Mitchell's work is highly respected by critics, and she has deeply influenced fellow musicians in a diverse range of genres.