CBS has announced it has renewed Big Brother for a fourteenth season which will air next summer.

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Big Brother's currently airing thirteenth season has averaged 8.11 million total viewers, a 3.1/9 rating/share in the Adults 18-49 demographic, a 2.5/9 rating/share among Adults 18-34, and a 3.7/10 rating/share among Adults 25-54 throughout its three-times-a-week broadcast schedule.

Compared to last summer's twelfth season, the figures represent a 4% percent increase in total viewers, 11% percent among Adults 18-49, 4% percent among Adults 18-34, and 12% percent among Adults 25-54.

In addition, CBS' Big Brother website has logged an 18% percent increase from last summer, while CBS and RealNetwork's 24/7 live streaming video subscribers has increased by 10% percent. Showtime's Big Brother: After Dark has also increased by 8% percent.

Big Brother's special 90-minute thirteenth-season finale and reunion show will air live tonight at 9:30PM ET/PT following the premiere of Survivor: South Pacific and feature the season's three remaining houseguests -- Adam Poch, Porsche Briggs and Rachel Reilly -- battling for the $500,000 grand prize.