Sam Smith struggled with his vocal surgery recovery

Singer-songwriter Sam Smith has revealed that recovering from vocal surgery has been tough, but it has also taught him about his voice and how far he can push it.

Speaking to NBC News recently, the superstar admitted that he now realises his limitations and will change how he writes songs to accommodate his ability:

"It's been a struggle to get through. I've got to plan longer resting breaks in between shows. I just need to stop writing songs that are too high to sing."

Smith, meanwhile, just confirmed that he has recorded the theme for the upcoming new James Bond movie 'Spectre'. He confessed to the BBC that 'Writing's On The Wall' took a mere 20 minutes to write and he's very proud of it:

"I got called into the office with [producer] Barbara Broccoli and [director] Sam Mendes and they gave me the script, I read the script...they said 'have a go at the song'. It's the quickest I've ever written a song - it took 20 minutes...and they loved it! I love the song so much."

The 'Stay With Me' sensation also won the Ciroc Solo Artist prize at last night's (September 8) GQ Men Of The Year Awards ceremony, which was held in London at the Royal Opera House.

Watch an interview with Smith from the GQ Awards below: