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8 December 2013, 15:48
The British boy band performed their brand new single at the O2 Arena event.
Union J treated the Capital FM Jingle Bell Ball 2013 audience to a performance of their new single 'Loving You Is Easy'.
The song was penned alongside fellow Jingle Bell Ball star Jason Derulo, and features on Union J's self-titled debut album.
Union J's Jingle Bell Ball set also featured performances of 'Beautiful Life' and 'Carry You'.