Hopefuls try to impress the judges as auditions continue.

Vocalists in Kansas City, Mo., audition for the judges in hope of making it to the next round.

Vocalists in New York -- the hometown of judge Jennifer Lopez -- audition in hope of making it to the next round; guest judge Adam Lambert.

Another round of vocalists audition for the judges in hope of making it to the next round.

The auditions continue as more vocalists try to impress the judges in hope of making it to the next round.

The auditions continue.

The auditions continue.

Hollywood Week opens with the singers forming lines of 10 and performing for the judges.

Hollywood Week continues.

Hollywood Week continues as the contestants perform solos.

Hollywood Week continues and the Top 48 singers are revealed.

The contestants perform in a showcase at the House of Blues; some of the contestants learn their fate.

The final performances take place at the House of Blues; the judges finish selecting the top 24 contestants.

The top 12 guys perform in hope of winning America's votes.

The top 12 girls perform in hope of earning America's votes.

The result of last week's vote and the Top 8 Girls perform.

The result of last week's vote and the Top 8 Boys perform.

The 16 remaining contestants are whittled down to the Top 12 finalists.

The Top 12 perform for America's votes.

The results of last week's vote and the Top 10 perform.

The result of last week's vote and the Top 9 perform.

The result of last week's vote and the Top 8 perform.

The result of last week's vote and the Top 7 perform.

The result of last week's vote and the Top 6 perform.

The result of last week's vote and the Top 5 perform.

The result of last week's vote and the Top 4 perform.

The result of last week's vote and the Top 3 perform.

The final performance show of the season gives America one last chance to vote for the winner.

A night of featured performances climaxes with the revelation of this year's American Idol winner.