In a series of steps, the show selects the eventual winner out of many tens of thousands of contestants.
From seasons four to seven, as well as season nine, the 24 semifinalists were divided by gender in order to ensure an equal gender division in the top 12. The men and women sang separately on consecutive nights, and the bottom two in each groups were eliminated each week until only six of each remained to form the top 12.
The most popular contestants are usually not revealed in the result show, instead typically the three contestants (two in later rounds) who received the lowest number of votes are called to the center of the stage. One of these three is sent to safety, the two remaining however need not both be ones with the fewest votes. The contestant with the fewest votes is then revealed and eliminated from the competition. A montage of the eliminated contestant is played and they give their final performance. However, starting in season eight, the judges may overturn viewers' decision with a "Judges' Save" – they can save a contestant on a unanimous decision, but two will be eliminated the following week. The save can only be used once, and only before top five.
In the finale, the two remaining contestants perform to determine the winner. For the first six seasons, apart from season two, the finale was broadcast from the Kodak Theatre, which has an audience capacity of approximately 3,400. The finale for season two took place at the Gibson Amphitheatre. From season seven onwards, the venue was changed to the Nokia Theatre, which holds an audience of over 7,000. A special two-hour result show the next night follows where the winner is announced at the end.
Contestant eligibility
The eligible age-range for contestants is currently 15–28 years old. The initial age limit was 16–24 in the first three seasons, but the upper limit was raised to 28 in season 4, and the lower limit was reduced to 15 in season 10. The contestants must be legal U.S. residents, and must not hold any current recording or talent representation contract by the semifinal stage (in previous years by the audition stage).
Season 9's Denver audition, at Invesco Field at Mile High.
Initial auditions
Contestants go through three rigorous sets of cuts. The first is a brief audition with three other contestants in front of selectors which may include one of the show's producers. The number of auditioners can exceed 10,000 people each city, but only about 100–200 contestants in each city may make it past this round of preliminary auditions. Successful contestants are sent through to audition in front of producers. More contestants are cut in the producers round before they can proceed to audition in front of the judges, which is the only audition stage shown on the show. Those selected by the judges are sent to Hollywood. Between 10–60 people in each city may make it to Hollywood.Hollywood week
Once in Hollywood, the contestants perform individually or in groups in a series of rounds. For most years there were eliminations in three rounds by the judges. In the first round the contestants emerged in groups but performed individually. For the next round, the contestants split themselves up into small groups and perform a song together. In the final round, the contestants perform solo with a song of their choice a cappella or accompanied by a band depending on the season. In season 2 and 3, contestants were also asked to write original lyrics or melody in an additional round after the first round. In season 7 the group round was eliminated and, on judges approval, contestants may move directly to the final Hollywood round after a first solo performance. The second round that year resembled the first round of previous years. In Season 10 an additional round at Las Vegas and a further solo round were added. At the end of the Hollywood week, 24–36 contestants were selected to move on to the semifinal stage.Audience voting
From the semifinal onwards, the fate of the contestants is decided by public vote. During the contestant's performance as well as the recap at the end, a toll-free telephone number for each contestant is displayed on the screen. For a two-hour period after the episode ends (up to four hours for the finale) in each US time zone, viewers may call or send a text message to their preferred contestant's telephone number, and each call or text message is registered as a vote for that contestant. Viewers are allowed to vote as many times as they can within the two-hour voting window, however, the show reserves the right to discard votes by power dialer. One or more of the least popular contestants may be eliminated in successive weeks until a winner emerges. Over 110 million votes were cast in the first season, and by season eight the seasonal total increased to 624 million. Voting via text messaging was made available in the second season when AT&T Wireless joined as a sponsor of the show, and 7.5 million text messages were sent to American Idol that season. The number of text messages rapidly increased, reaching a peak of 178 million texts in season eight. Online voting was offered for the first time in Season 10. The votes are counted and verified by Telescope Inc.Semifinals
In the first three seasons, as well as season eight and ten, the semifinalists were split into different groups to perform individually in their respective night. In season one, there were three groups of ten, with the top three contestants from each group making the finals. In seasons two and three, there were four groups of eight, and the top two of each selected. In season eight there were three groups of twelve, with three contestants moving forward – the highest male, the highest female, and the next highest-placed singer. In season ten, the girls and boys perform on separate nights and five of each were chosen. These five seasons also featured a wildcard round where contestants who failed to qualify were given another chance. In season one, only one wildcard contestant was chosen by the judges, giving a total of ten finalists. In seasons two and three, each of the three judges championed one contestant with the public advancing a fourth into the finals, making 12 finalists in all. In season eight, four were chosen by the judges to produce a final 13. In Season ten, three wild-cards were chosen, again making a total of 13.From seasons four to seven, as well as season nine, the 24 semifinalists were divided by gender in order to ensure an equal gender division in the top 12. The men and women sang separately on consecutive nights, and the bottom two in each groups were eliminated each week until only six of each remained to form the top 12.
Finals
The finals are broadcast in prime time from CBS Television City in Los Angeles, in front of a live studio audience. The finals lasted eight weeks in season one, eleven weeks in subsequent seasons until season ten which lasted twelve weeks. Each finalist performs songs based on a weekly theme which may be a musical genre such as Motown, disco, or big band, songs by artists such as Michael Jackson, Elvis Presley or The Beatles, or more generic themes such Billboard No.1 hits or songs from the contestant's year of birth. Contestants usually work with a celebrity mentor related to the theme. In season ten, Jimmy Iovine was brought in as a mentor for the season. Initially the contestants sing one song each week, but this is increased to two songs from top four or five onwards, then three songs for the top two or three.The most popular contestants are usually not revealed in the result show, instead typically the three contestants (two in later rounds) who received the lowest number of votes are called to the center of the stage. One of these three is sent to safety, the two remaining however need not both be ones with the fewest votes. The contestant with the fewest votes is then revealed and eliminated from the competition. A montage of the eliminated contestant is played and they give their final performance. However, starting in season eight, the judges may overturn viewers' decision with a "Judges' Save" – they can save a contestant on a unanimous decision, but two will be eliminated the following week. The save can only be used once, and only before top five.
In the finale, the two remaining contestants perform to determine the winner. For the first six seasons, apart from season two, the finale was broadcast from the Kodak Theatre, which has an audience capacity of approximately 3,400. The finale for season two took place at the Gibson Amphitheatre. From season seven onwards, the venue was changed to the Nokia Theatre, which holds an audience of over 7,000. A special two-hour result show the next night follows where the winner is announced at the end.