Joni Mitchell delivered a rare live performance in Toronto last night (June 18) by singing at a tribute concert for her birthday — watch fan-filmed footage of it below.

The iconic singer was expected to read a poem at the event celebrating her 70th birthday, which featured performances from Rufus Wainwright, Kathleen Edwards and Glen Hansard amongst others. However, as Holy Moly reports, Mitchell surprised the audience by singing the track Furry Sings The Blues from her 1976 album HEIJRA as well as Don't Interrupt The Sorrow (from 1975's THE HISSING OF SUMMER LAWNS) and a version of Woodstock with other musicians taking part in the event at Massey Hall.

Taylor Swift is currently being mooted to play Joni Mitchell in Girls Like Us, a film adaptation of Sheila Weller's book about Mitchell and her 1970s peers Carole King and Carly Simon. Speaking about the role at the end of last year, she said it was still under discussion: "That's actually not confirmed. I wish I could say it's confirmed! But the thing about movies that I've learned is, I've been reading scripts for five years, and you just don't know what ones are going to get greenlit and which ones aren't, so I can't talk about it unless it's the real thing."

Joni Mitchell released her last album SHINE in 2007.