Five new shows have been scheduled for the UK and Ireland next summer
The event will take place in LA today
Further acts will be announced in the coming weeks and tickets are on sale now
The surprise collaboration closed the third and final night of the Chicago festival
She is currently in the middle of a tour with Joan Jett and the Blackhearts
The letter has been signed by more than 400 artists including Carly Rae Jepsen, Alanis Morissette and Neil Young
'Schitt's Creek' fave and all-around funny man
"There’s just so much intense stuff happening. You think about their resilience and their ability to keep going in the face of tragedy, it’s pretty poignant"
Morissette recently released a Christmas EP, which features festive songs from John Lennon and more
General sale begins November 17 - find all dates and ticket info here