The former Beatles drummer had previously canceled several concerts in Canada.
The 82-year-old former Beatle had already been forced to scrap several shows.
The surviving Beatles and Olivia Harrison posted social media tributes to the musician.
Paul McCartney and Ringo Starr posted tributes marking the 40th anniversary of the rock legend's death.
The Beatles legend and friends were all aboard for a rollicking version of the classic song on "The Tonight Show."
It was a zillion years ago today, Sgt. Pepper taught the band to play.
Breitbart's Joel Pollak appears to imply that a slam against the Senate nominee is a slam against the 1973 version of "You're Sixteen."
Paul McCartney and Ringo Starr have debuted "We're on the Road Again."