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The pop star’s beach vacation from on her Circus tour has come to an end and Britney Spears back to work. Spears started the British leg of her concert tour with a splashy show at the O2 Arena in Greenwich.

Britney was in full force, showing off her toned bikini-body in various costumes comprised of beaded bra tops, fishnets and boots. All eyes were definitely on her as she performed her hits on stage for the London crowd.

Prior to Brit-Brit’s appearance on stage, the highly flexible singer Ciara opened the evening’s festivities for the evening with a performance of her own. All kinds of sexy feats were being performed that night.

Gallery Info: Britney Spears performs her Circus tour at the O2 Arena in London.