Watch a video of Duffy accepting the award:
The BBC's article is below.
Duffy wins Mojo best song award
Welsh singer Duffy's single Mercy has been named song of the year at Mojo magazine's awards in central London.
The soul singer lost out in the best breakthrough act category to The Last Shadow Puppets - the side project of Arctic Monkeys singer Alex Turner.
And she was beaten to best album by Nick Cave and the Bad Seeds.
Other acts honoured at the reader-voted Mojo Honours List bash at The Brewery included Led Zeppelin, Paul Weller, the Sex Pistols and Genesis.
As she collected her award, Duffy said she had "never won anything" in her life.
The 24-year-old dedicated her win to her father, who is retiring after running a club in her home town, Nefyn, for 35 years.
"He tells me he's only got four bingos left," she said. "So this is for him tonight and thanks everyone for your support."
Mojo's editor-in-chief Phil Alexander told the audience Mercy won because it was "a timeless song".
"It could really have come from any period in time over the last 50 years," he said.
Full list of winners
• Song Of The Year Award: Mercy by Duffy
• Best Breakthrough Act: The Last Shadow Puppets
• Best Album Award: Dig!!! Lazarus Dig!!! by Nick Cave & The Bad Seeds
• Hero Award: Motorhead
• Icon Award: The Sex Pistols
• Best Live Act Award: Led Zeppelin
• Classic Songwriter Award: Neil Diamond
• Hall Of Fame: The Specials
• Lifetime Achievement Award: Genesis
• Special Award: Judy Collins
• Legend Award: Irma Thomas
• Classic Album Award: Loveless by My Bloody Valentine
• Inspiration Award: John Fogerty
• Outstanding Contribution To Music Award: Paul Weller
• Roots Award: Toots Hibbert
• Les Paul Award: John Martyn
• Maverick Award: Mark E Smith
• Vision Award: Julien Temple for The Future Is Unwritten
• Compilation Of The Year Award: Juno Original Soundtrack
• Catalogue Release Of The Year: Pillows & Prayers Cherry Red Records 1981-1984
Metro has a video of the awards.
ITN also has a video.