Usher descended on Hammersmith Apollo last night in London to give a special one-off performance as part of the American Express Unstaged Series.

The electrifying set that took place in front of hundreds of fans and was also streamed live to milllions via YouTube.

The singer worked the jam-packed crowd with a host of chart-rippers off his new album Looking 4 Myself, including 'Climax' and 'Scream'.

The hour-long set went down trumps with Usher's fans who were treated to numerous special effects, including avatar-style backing dancer, designed by fans.

Check out the gallery to see Usher rock out in London...

Usher Wows Crowd At Hammersmith Apollo...