Her performance was a rarity given the star’s recent health problems. She ended up cancelling her UK tour after several shambolic performances, citing husband Blake Fielder-Civil - who is being held in custody - as the reason she could not go on.

But after winning the five awards, she hugged several people, including her mother Janis, as the crowd chanted: "Amy, Amy, Amy."

The singer put her arm around her mother and added: "To my mum and dad. To my Blake, my Blake incarcerated."

Amy’s US visa application rejected - Feb 8 2008
Amy Winehouse will not perform at the Grammy Awards because her US visa application has been rejected.

The Back To Black star - currently in rehab for drug addiction - had been invited to sing at the event this Sunday. She has been nominated for six awards.

But the US Embassy in London turned down her application.

A spokesman for the star said: "Amy Winehouse will not be performing at this year’s Grammy Awards ceremony.

"Unfortunately, her application for a visa to enter the United States of America has been rejected at this time by the American Embassy in London.

"Amy has been progressing well since entering a rehabilitation clinic two weeks ago and although disappointed with the decision has accepted the ruling and will be concentrating on her recovery.

"Amy has been treated well and fairly by the Embassy staff and thanks everyone for their support in trying to make this happen. There will of course be other opportunities and she very much looks forward to visiting America in the near future."

The 24-year-old singer attended a meeting with embassy officials on Monday, accompanied by her lawyer.

In addition to her current well-documented addiction problems - she entered rehab on January 24 after a video emerged of her apparently smoking crack cocaine - she was arrested and fined in Norway last October for possession of cannabis.

Amy’s six Grammy nominations include Record of the Year for Rehab.

Amy questioned over ’crack’ video - Feb 6 2008
Singer Amy Winehouse has been questioned in connection with a video which allegedly showed her smoking crack cocaine.

A Scotland Yard spokesman said officers from Tower Hamlets had interviewed a 24-year-old woman in connection with an allegation of unlawful possession of a controlled drug.

He said she was not arrested, but was interviewed under caution and inquiries were continuing.

Last month footage obtained by the Sun appeared to show Winehouse inhaling fumes from a crack pipe after an alleged 19-minute drugs binge in which she snorted ecstasy and cocaine and admitted to downing six Valium.

The disturbing images were said to have been filmed during a party at Winehouse’s east London home, hours before she attended a court hearing for husband Blake Fielder-Civil.

He is awaiting trial on charges of assault and conspiracy to pervert the course of justice.

The Back to Black star is now in rehab, admitting herself to the Capio Nightingale clinic in north London on January 24 days after the video appeared.

On February 4 the singer took a break from her treatment to apply for a US visa so she could attend the Grammys in Los Angeles on February 10, where she is nominated for six awards.

The application process will not be simple due to her drugs record. Last October she was arrested and fined in Norway for possession of cannabis.

Amy applies for US visa - Feb 5 2008
Singer Amy Winehouse has taken a break from rehab to apply for a US visa.

The Back To Black star left her London clinic for a few hours to meet officials at the US Embassy.