Celebrity Big Brother 11 is the eleventh series of the British reality television series Celebrity Big Brother. It launched on 3 January 2013,[1] and will air on Channel 5 and 5* for 23 days concluding on 25 January 2013.[citation needed] The series is part of a new two-year contract signed by Channel 5 with Endemol to air the show until 2014.[2] It is the fourth celebrity series to air on Channel 5 and the sixth series of Big Brother to air on the broadcaster since they acquired the show.