The music superstar apologised as she told fans she was too unwell to perform at the gig in Phoenix, Arizona, on Wednesday.

She was due to appear for a second night at the 18,000-seat Talking Stick Resort Arena as part of her sell-out 2016 world tour.

In a video posted on her Twitter account, a visibly emotional Adele said: "I'm really, really sorry. I've had a cold for a couple of days and I've been pushing through it.

"I did my show last night and I loved it but I pushed too hard and my cold has gotten the better of me."

The Hello singer, who is due to perform two concerts in Los Angeles this weekend, told fans she would reschedule the postponed show.

She added: "I've enjoyed my tour so much and cancelling shows has not been something I want to do.

"I'm so sorry to let you down. I know lots of people will be flying in from all over. It's the last thing I want to do but I have to look after myself because I've got so many more shows to do.

"I will reschedule this show, I promise you. And I will come back and I'll smash it for you."

Adele, 28, has a string of concerts planned across North America before completing her tour in Mexico City in November.