JOIN USDressed as a ringmaster in a sequinned hat, blazer, fishnet tights and knee high boots, she began with a bang, descending from the rafters in a circus hoop, Daily Mail reported.
After two years of troubled celebrity life, Spears burst back into the limelight, kicking off the show at The 02 arena in Greenwich with her current hit song 'Circus'.
Showing off a tanned and toned midriff as she performed 'Radar' in a jewelled bra and shorts, the controversy's favourite child did not show any sign of the flab that she had put on in the past two years.
'What's up London. I am so happy to be here tonight," Spears shouted out to her fans, who were in for a visual treat, with unicycles, magician's style boxes, and clowns keeping the 'Circus' theme alive throughout.
The stadium audience was on their feet cheering as she belted out crowd favourites 'Toxic' and a 1990's hit 'Hit Me Baby One More Time'.
Later she played an extended version of Womanizer dressed as a sexy policewoman.
The singer ended her gig in a blaze of confetti and fireworks.