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8 December 2013, 22:52 | Updated: 14 January 2014, 22:22
The US star performed her debut single for the Jingle Bell Ball crowd at the O2 Arena.
Katy Perry wowed with a performance of her first single 'I Kissed A Girl' at the Capital FM Jingle Bell Ball 2013.
The 'Teenage Dream' star originally released the track way back in April 2008 as the lead track from her debut album 'One Of The Boys'.
Katy also performed ‘Firework’, ‘Last Friday Night’,’California Gurls’, ‘ ‘Teenage Dream’, Wide Awake’,’ Unconditionally’ and recent chart-topper ‘Roar’ during her #CapitalJBB live set.