Usher has been paid a massive half of million quid this weekend - just for appearing at a birthday party.

Businessman Andrew Williams paid out the massive fee to surprise girlfriend Katie Teague after hearing Usher was in the UK to perform at the Radio 1 Big Weekend  show.

A pal tells the Sunday Mirror, "Andrew has previously hired Jamelia and The Darkness for private events. But Usher is Katie's idol."

Usher said Katie Happy Birthday at the celebrations at a London nightclub before performing his hit ‘Yeah’.

Despite receiving £500,000 for the gig, Usher slipped up at the Radio 1 show in Maidstone yesterday after bounding on to stage and exclaiming, “Hello Manchester!”