Celebrity Big Brother 2010, also known as Celebrity Big Brother 7, was the seventh series of the British reality television series Celebrity Big Brother and the final series to air on Channel 4 and E4. It began on Sunday 3 January 2010 and aired for 27 days until the final on 29 January 2010, making it the longest Channel 4 series of Celebrity Big Brother. The series launched with 6.7 million viewers and became the most watched series of Big Brother UK since the eighth regular series in 2007, averaging 3.7 million viewers per night.
Davina McCall returned as main presenter, also hosting Big Brother's Big Mouth. George Lamb returned to present Big Brother's Little Brother. The show was sponsored by the bed retailer Dreams, who also sponsored the previous celebrity series.
Alex Reid won the show with 65.9% of the final vote, hence becoming the final Channel 4 Celebrity Big Brother winner. No housemates from this series appeared in Ultimate Big Brother later on in the year.
A Celebrity Big Brother 7 pre-series special show, Top 20 Celebrity Big Brother Moments, featured the series' most memorable moments of the show according to viewers who have voted online. The show aired on E4 on 28 December 2009. Within the special, the new graphics for the upcoming series were introduced.
On 13 December 2009, the first trailer was aired on Channel 4, during a screening of film Elf. A hell theme, similar to that of Big Brother 2004 and Big Brother 2008 was hinted with a tagline in the trailer that said: "Hell Lies in Others". Five days later on 18 December 2009, the first full 30-second long trailer was aired, with the eye present.