Hopefuls perform for the judges in New York.

Hopefuls perform for the judges in Chicago..

Hopefuls perform for the judges in Charlotte.

Hopefuls perform for the judges in San Antonio, TX & Los Angeles, CA.

Hopefuls perform for the judges in Oklahoma City.

The contestants who impressed the judges in their respective audition cities will head to Hollywood, where some dreams will come true and others will come to an end. The intensity of the competition heats up as hopefuls chosen from around the nation vie for a coveted semifinalist spot.

The tough Hollywood Round continues, as judges Mariah Carey, Randy Jackson, Nicki Minaj and Keith Urban narrow down the contestants. Some will leave with shattered dreams, others will move on in the competition.

The ultimate singing stage test resumes in Hollywood as the contestants vie for a coveted spot in the semifinals.

In the final Hollywood episode, the judges reveal the Top 40 contestants - 20 guys and 20 girls - who remain in the competition. These contestants will travel to Las Vegas in hopes of impressing the judges one more time. See which contestants shine and which ones crack under the pressure.

Ten female semifinalists perform in Las Vegas.

Ten male semifinalists perform in Las Vegas.

Ten female semifinalists perform in Las Vegas.

Ten male semifinalists perform in Las Vegas

Ten singers perform in Las Vegas.

Ten more singers perform.

The top 10 finalists perform songs that have been performed by previous Idols.

The top nine take on songs from The Beatles (John Lennon/Paul McCartney Songbook).

The finalists perform music from Detroit, particularly from the Motown era, for the judges. Smokey Robinson mentors the contestants.

The contestants face elimination. Colton Dixon performs; OneRepublic featuring Katharine McPhee performs; Keith Urban performs.

The top 7 finalists perform classic rock songs.

The contestants face elimination. Carrie Underwood performs; Casey James performs.

The top 6 finalists perform songs by Burt Bacharach & Hal David and Songs They Wish They'd Written.

The finalists face elimination; Scotty McCreery performs; Kelly Clarkson performs.

The top 5 perform songs from the Year They Were Born and songs by Divas.

The contestants face elimination. Clay Aiken performs; Fantasia Barrino performs.

The top 4 finalists perform Contestant's Choice and One-Hit Wonders.

The contestants face elimination. Stefano Langone performs; Lee DeWyze performs.

The top 4 finalists performs a hit song of 2013 and a song from the Great American Songbook standards.

The contestants face elimination. David Cook performs; will.i.am peforms; Harry Connick Jr. performs.

Each finalist performs a song chosen by Jimmy Iovine, the judges and the producers. Highlights also shown from their hometown visits.

The top 2 finalists are determined. Lauren Alaina performs; Alicia Keys performs.