"Jeff has been battling a systemic infection and is currently in the care of a team of doctors," organizers wrote on July 12.

BST Hyde Park has cancelled the final day of its festival after Lynne, 77, withdrew from the band's headline slot at the last minute due to health concerns. He had been due to front the rock band on Sunday, but stepped back on the advice of his doctors following a "systemic infection", according to a statement released by ELO.

Jeff Lynne's ELO canceled its July 13 performance at BST Hyde Park in London. The show was billed as the group's final concert ever.