British singer Yungblud has cancelled his scheduled performance at the Tons of Rock festival in Oslo this Friday. The artist announced the cancellation via an Instagram audio message, citing significant vocal strain and a doctor’s recommendation to rest. Yungblud indicated he is experiencing hoarseness and plans to undergo a tonsillectomy later this year. He was set to headline the festival’s Friday lineup. Following the announcement, disappointed fans have begun reselling their Friday-only tickets. The cancellation impacts a key performance at the popular Norwegian rock festival.