|Overview||:|| Celebrity Big Brother is a British reality television game show in which a number of celebrity contestants live in an isolated house trying to avoid being evicted by the public with the aim of winning a large cash prize being donated to the winner's nominated charity at the end of the run. The programme aired annually between 2001 and 2011, until 2012 when, for the first time, two series aired in the same year. This process has since continued.
The show is a spin-off of the original series Big Brother. There are a number of differences between Big Brother and Celebrity Big Brother. For example, Celebrity Big Brother lasts for a much shorter time than Big Brother and the celebrities – so long as they are not ejected or quit the programme – are paid for their participation.
From its inception in 2001, Celebrity Big Brother was broadcast on Channel 4 and its sister channel E4, until Big Brother was cancelled by Channel 4 in 2010 due to falling ratings. Celebrity Big Brother has been broadcast on Channel 5 and its sister channel 5* since Channel 5 acquired the rights in 2011. During its run on Channel 4, Celebrity Big Brother was presented by Davina McCall, who also presented the original show.|