Big Brother (Australian season 7)
Big Brother Australia 2007, also known as Big Brother 7, was the seventh season of the Australian reality television series "Big Brother". Episodes were broadcast on Network Ten in Australia, and the first episode aired on 22 April 2007. 
Despite a drop in ratings compared to previous series, and a number of controversies, the then "Big Brother" executive producer Kris Noble considers the year's series a success. At the end of this season's finale broadcast 30 July 2007, it was announced by host Gretel Killeen that "Big Brother" would be returning for an eighth season in 2008. In the finale Aleisha Cowcher was announced winner of "Big Brother Australia 2007". She won by the closest winning margin ever in the Australian series. The news the following day reported a margin of 51% versus 49% – a difference of 65 votes. This was the last season hosted by Gretel Killeen.
List of Big Brother (Australian TV series) shows
The show features live footage from the House; interviews with evicted housemates; and brain teasers where viewers attempt to solve challenges such as word games, and may phone in for a chance to win up to $1000. An online stream was made available for the 2006 season at QuizTV.com.au specifically for viewers in states that do not receive "UpLate" live on television (i.e. South Australia, Western Australia and the Northern Territory), enabling them to enter the competitions. It was possible for this stream to be viewed by those outside of Australia. An online stream was made available once more for the 2007 season. During the 2007 season of "Big Brother" a Sunday evening edition of the show was added.