Rapper Tinie Tempah has been named British breakthrough act at the Brit Awards, his track Pass Out also won him best British single.
The Suburbs by Arcade Fire has been named best international album, while the Canadian band also took home best international group.
Best British male solo artist has been won by Plan B, Laura Marling is the winner of this year's Brit Award for British female solo artist.
Teenage singer Justin Bieber got international breakthrough and US chart star Cee Lo Green took to the stage to collect best international male solo artist.
Hosted by James Corden the music awards show is underway at the O2 Arena in London.
There have been performances from Take That, Rihanna and Mumford and Sons.