Celebrity Big Brother 12 was the twelfth series of the British reality television series Celebrity Big Brother. It launched on 22 August 2013 three days after the fourteenth regular series final in two parts. The series ended after 23 days on 13 September 2013, with Charlotte Crosby voted the winner by the public. It continued to air on Channel 5 as part of a two-year contract with Endemol, which secured the show until 2014. It was the fifth celebrity series to air on Channel 5 and the eighth series of Big Brother to air on the broadcaster overall since they acquired the show.
This was the first celebrity edition to be hosted by Emma Willis. Willis continued to host Bit on the Side alongside Rylan Clark and AJ Odudu.
This series also saw the return of viewers voting to 'Save', a format that was not used in the prior fourteenth regular series.