Sam Smith has said his recent throat operation was a "massive blessing in disguise".
"It was a worry just because I hate cancelling shows and disappointing people and that was horrible, but in terms of my health and my voice it was actually a massive blessing in disguise," he told Radio 2's Ken Bruce.
"I went to the throat doctor who looked after Adele and saved Julie Andrews' voice and I was in really good hands.
"So I never doubted that my voice would come back, it was just the pain of having to reschedule stuff."
"And even now it's just changed the way I feel about my voice. I'm a bit more scared than normal which is a good thing I guess."
Smith is the latest star to perform on BBC Radio 2's In Concert at the BBC Radio Theatre in London.
The Stay With Me singer had to postpone a number of concerts earlier this year after doctors discovered bleeding in his throat.
He posted a message on his Instagram account, telling fans about he had to have surgery.
"I'm so gutted to be missing all of the shows and events I was meant to be playing at," he wrote.
"The doctors say I will be back in 6-8 weeks and I cannot wait to sing for you all soon."
Smith also commented on his slimmer frame.
"I lost weight, that's probably a good thing. I was really fat before. Trust me, I was fat," he said.
Radio 2 In Concert with Sam Smith will be available to view on BBC Red Button until Wednesday September 9.
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