A senior Iranian official denied the reports describing them as 'psychological warfare'
The eccentric New Yorker was awarded all three prizes she was nominated for, including Best International Female Solo Artist and International Breakthrough Act.
Sporting a lace outfit with a huge white wig and mask at the London ceremony, she also picked up the award for Best International Album for The Fame.
Picking up her album award, the tearful star said: “I was really excited to win the first two awards. This award means even more to me because I worked so hard on this album for so long.
“My fans were the first people to believe in me. Thank you so much.”
The 23-year-old, who dedicated the night to fashion designer Alexander McQueen who died last week, led the way in a night of success for female artists.
British singer Lily Allen was named Best British Female Solo Artist and another homegrown talent, Florence And the Machine — the stage name for singer Florence Welch — picked up Best British album for Lungs.
Girl band the Spice Girls picked up the Best BRIT Awards Performance of the last 30 years for their 1997 rendition of Wannabe and Ellie Goulding won the Critics’ Choice award, no mean feat given that she has yet to release her debut album.
The 23-year-old singer songwriter, who also topped a BBC poll for the Sound of 2010, releases Lights next month.
But male artists and groups did not leave the ceremony empty-handed — US rapper Jay-Z, Oasis, and British singer Robbie Williams were among those honoured.
And Britain’s Prince Harry broadcast a message to the audience, hailing the event as a celebration of “all that is totally wonderful and unique about British music.”
Williams, a former member of boy band Take That, was honoured with his 16th Brit, and celebrated his success with a live medley of his international hits including Let Me Entertain You and Angels.
Jay-Z picked up bBest International Male Solo Artist and Oasis received a special award for the Best Brits Album of the past 30 years for their record (What’s The Story) Morning Glory?
British boy band JLS, who finished second in TV talent show The X Factor in 2008, polished off a year of number one singles and a top-selling album with two awards — best British group and best British single for Beat Again.
The show suffered a shaky start when the sound disappeared and the host, British comedian Peter Kay, appeared confused, tapping his microphone to check it was working while the message “audio is muted” came on screens.
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