Usher dominated the Billboard magazine music awards in Las Vegas, winning 11 gongs - including artist of the year.
Alicia Keys won seven awards, while triple Grammy winners OutKast were named group of the year.
Soul legend Stevie Wonder received a lifetime achievement award reports BBC online.
The awards were held at the MGM Grand in Las Vegas, hosted by American Idol TV show presenter Ryan Seacrest.
Green Day, Gwen Stefani and Nelly were among the performers at the show.
The awards honour the year's leading artists and songs in the US as determined by their performance on Billboard magazine's weekly charts in genres including rock, rap and country.
Britney Spears presented the first award of the evening in her first public engagement since her wedding to Kevin Federline.
The singer arrived wearing a see-through dress and carrying her puppy.document.write(unescape("