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Sam Smith will miss out on Radio 1's Big Weekend because he has to have an operation on his vocal cords.

In a message to fans on Instagram, the singer said: "Bad news. I have my operation booked for next week, so getting really nervous.

"But by doing this in 8 weeks time I'm gonna be able to sing like never before so it's worth it. I am so sorry to all."

Smith was due to perform a number of gigs in the US and Europe as well.

It's not clear which ones will go ahead.

Radio 1's Big Weekend in Norwich takes place on 23 and 24 May, so he'll have to miss that out.

In a statement Radio 1 said: "We are really sorry for all the fans who were looking forward to seeing Sam perform live. Everyone at Radio 1 wishes him a speedy recovery."

He's also due to play at Brighton's Wildlife Festival on 7 June.

Last week Smith had to cancel his Australian tour which included four dates and a performance at the TV Week Logies, the annual Australian television industry awards.

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