Zayn Malik has pulled out of a performance at the Capital FM Summertime Ball because of an "anxiety" attack.
The former One Direction star, who was due to perform at the Wembley Stadium show, posted a lengthy apology and explanation on his Instagram account.
"Unfortunately, my anxiety that has haunted me throughout the last few months around live performances has gotten the better of me," he said.
"With the magnitude of the event, I have suffered the worst anxiety of my career. I cannot apologise enough.
"I promise I will do my best to make this up to everybody I've let down today."