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.
Big Brother (Australian TV series)
In "Big Brother 2001", "Big Brother 2002", and "Big Brother 2003", the cash prize stood at a guaranteed A$250,000. In "Big Brother 2004", the prize money was raised to a guaranteed $1,000,000. "Big Brother 2005" and "Big Brother 2006" both continued to offer the $1,000,000 prize money, however, with the introduction of the fines system. The winner of "Big Brother 2005" received $836,000 in prize money, while the winner of "Big Brother 2006" received $426,000 as a result of the fines system. Housemates in "Big Brother 2005" and "Big Brother 2006" were given opportunities to regain lost prize money in special "Friday Night Live" events named: "The Prize Fight". "Big Brother 2007" was advertised as having no prize money available to the winner of that series. Later, when the series began, it was revealed that prize money could be accumulated upon the successful completion of tasks. The prize money at the end of the series stood at $450,000. In "Big Brother 2008", the prize money was not mentioned until halfway through the series, eventually being revealed as $250,000. In "Big Brother 2012", the prize fund was not mentioned until the end of the second week when the prize was revealed as a guaranteed $250,000.