"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.

Rock and Roll Hall of Famer and Electric Light Orchestra frontman Jeff Lynne canceled the final concert of his "Over and Out" farewell tour at the BST Hyde Park festival in London on Sunday due to a "systemic infection.