<Tr> <Td_colspan="2"> Official website </Td> </Tr> <P> The Voice is an American reality television singing competition broadcast on NBC . Based on the original The Voice of Holland, the concept of the series is to find currently unsigned singing talent (solo or duets, professional and amateur) contested by aspiring singers, age 15 or over (reduced to 13 since season 12), drawn from public auditions . The winner is determined by television viewers voting by telephone, internet, SMS text, and iTunes Store purchases of the audio - recorded artists' vocal performances . They receive US $100,000 and a record deal with Universal Music Group for winning the competition . The winners of the thirteen seasons have been: Javier Colon, Jermaine Paul, Cassadee Pope, Danielle Bradbery, Tessanne Chin, Josh Kaufman, Craig Wayne Boyd, Sawyer Fredericks, Jordan Smith, Alisan Porter, Sundance Head, Chris Blue and Chloe Kohanski . </P> <P> The series employs a panel of four coaches who critique the artists' performances and guide their teams of selected artists through the remainder of the season . They also compete to ensure that their act wins the competition, thus making them the winning coach . Members of the coaching panel include Adam Levine, Blake Shelton, Christina Aguilera (seasons 1--3, 5, 8, 10), CeeLo Green (seasons 1--3, and 5), Shakira (seasons 4 and 6), Usher (seasons 4 and 6), Gwen Stefani (seasons 7, 9, and 12), Pharrell Williams (seasons 7--10), Miley Cyrus (seasons 11 and 13), Alicia Keys (seasons 11--12, and 14), Jennifer Hudson (season 13), and Kelly Clarkson (season 14). </P> <P> The Voice began airing on April 26, 2011, as a spring TV season program . The show proved to be a hit for NBC and was subsequently expanded into the fall cycle when season three premiered on September 10, 2012 . The series premiered its twelfth season on February 27, 2017 . On October 18, 2016, NBC renewed the series through its thirteenth season . On May 10, 2017, NBC renewed the series for a fourteenth series, along with announcing Jennifer Hudson as a new coach in the thirteenth season . The following day, it was announced that Kelly Clarkson would be a new coach in the fourteenth season . The thirteenth season premiered on September 25, 2017 . </P>

How many times has alicia been a coach on the voice
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