Adele had to begin her cover of George Michael's song Fastlove again during a tribute to the late star at the Grammys on Sunday night and she appeared to deliver an F bomb on live US TV in the process.

Singing against a backdrop of pictures commemorating Michael's life, a nervous Adele asked her band to start the song again, saying, "I can't do it again like last year. I'm sorry for swearing and I'm sorry for starting again.

"Can we please start it again? I'm sorry, I can't mess this up for him."

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Adele's second attempt at the very slowed-down version of Fastlove was a huge hit with the audience at the Staples Centre in LA.

Speaking backstage, Adele, a well-known George Michael fan who dressed up as the singer for her 27th birthday, said she was "devastated" that she had to restart her rendition of Fastlove and revealed Michael's family initially did not want a tribute to be included in the show.

"I had a bit of shaky rehearsal today but I've been working really hard on this tribute for a month, literally every day," she said.

Adele delivered an emotional tribute to the late George Michael at the Grammys

"I was devastated on Christmas Day. I had to go for a walk on my own and just read for a while. On Boxing Day I said to Simon, my partner, 'I have to do that tribute'. They didn't want a tribute at first, his family.
But they came back and said yes.

"I was like, 'Great, I have something in the pipeline, if you want me to do it I'll do it'.

"I found him to be one of the truest icons because a lot of the time, people who are that globally known and famous, there tends to be - not fakeness in a bad way - but they put on this massive bravado, this alter ego, to protect themselves."

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At last year's Grammy ceremony technical problems ruined her rendition of her song All I Ask.

After that performance, she tweeted: “The piano mics fell on to the piano strings, that’s what the guitar sound was. It made it sound out of tune. Shit happens”.

Adele opened this year's Grammys with a performance of Hello and has also won five awards

Watch the 59th Annual Grammy Awards tonight on RTÉ 2 at 9pm