<P> Each season begins with the "Blind Auditions," where coaches form their team of artists (8 in season 1, 12 in season 2 and seasons 4 - 12, and 16 in season 3) whom they mentor through the remainder of the season . The coaches' chairs are faced towards the audience during artists' performances; those interested in an artist press their button, which turns their chair towards the artist and illuminates the bottom of the chair to read "I want you ." At the conclusion of the performance, an artist either defaults to the only coach who turned around, or selects his or her coach if more than one coach expresses interest . </P> <P> In the "Battle Rounds," each coach pairs two of his or her team members to perform together, then chooses one to advance in the competition . In each season, coaches are assisted by celebrity advisors that are different each season . In the first season, coaches sit alongside their respective advisors in the battle stage . However, starting with the second season, the advisors no longer join the coaches in the battle stage . A new element was added in season three; coaches were given two "steals", allowing each coach to select two individuals who were eliminated during a battle round by another coach . </P> <P> The Knockout Rounds were also introduced in season three . A pair of artists within a team are selected to sing individual performances in succession . They are not told until a few minutes prior to their performances who their partner is . The artists get to choose their own songs in this round, although they continue to get help and advice from their respective coaches . At the conclusion of the performances, coaches would decide which one of each pair gets to advance to the next round . Just like in the battle rounds, the coaches can steal one eliminated artist from another coach starting with season five . </P> <P> The "Battles, Round 2" were introduced to replace the Knockout Rounds in season six . Similar to the Knockout Rounds, each singer is paired randomly within their team . One celebrity key adviser also assists all four of the coaches and their teams in preparation of these rounds . Coaches give each Battle pairing a list of songs and each pair must agree on which song to sing . Each coach can still decide which of their singers in each pair will advance to the next round . The coaches are also allowed one steal . However, the Knockouts were brought back in season seven . </P>

What is the knockout round in the voice
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