With new show host, Cat Deeley, the judges/choreographers critique each auditioning dancer in New York City and Charleston.

Dance auditions held at the historic Orpheum theater in Los Angeles. Some get tickets to go straight to Las Vegas, while others stick around to learn choreography. However, most are sent home, rejected.

Dance auditions in Chicago at The Legendary Chicago Theater.

Over 100 contestants, staying at the Aladdin Hotel in Las Vegas, battle it out to make it to the top 20. They have to get through Shane Sparks', Mia Michaels', and Brian Friedman's choreography.

The final 10 guys and 10 girls are chosen to go to Los Angeles and compete on stage live. One dancer gets disqualified.

The top 20 contestants are find out who they've been partnered with and perform before a live audience. Footage of rehearsals and interviews are shown.

A recap of the last show's performances, along with judges comments. All 20 contestants perform a dance routine choreographed by Brian Friedman. Special guests perform. Bottom 3 couples dance solo to stay in the competition.

The top 18 contestants perform.

The bottom 3 couples are revealed, based on viewer votes, and each contestant performs a solo to stay in the competition.

The judges show their favorite clips during auditions. Behind the scene footage of the contestants is shown. Hop, Swing and a Jump perform. The top 16 perform.

The bottom 3 couples, based on viewer votes, are revealed. The 6 dancers perform solos to impress the judges and stay in the competition. Natasha Bedingfield performs.

Unseen auditions and special clips are shown. Lil' C and the Neph Squad perform a krumping routine to Spaz Meter by The J-Squad. Top 7 couples perform.

The bottom 3 couples are revealed, based on viewer votes. Each dancer performs a solo to impress the judges and stay in the competition. Ne-Yo performs. One guy and one girl are eliminated.

Top 6 couples perform.

The viewer votes reveal the dancers in danger of being eliminated from the competition. Solos are performed. The Pussycat Dolls perform. One guy and one girl are sent home.

The top 5 couples are split up. Contestants are randomly partnered, dance two different styles and a solo. Viewers now vote for their favorite dancer, not favorite couple.

The top 10 dancers open the show with a Wade Robson pop-jazz group routine to the music "Ramalama (Bang Bang)" by Róisín Murphy. The results are revealed based on viewer votes. Bottom 4 perform solos. Chris Brown performs.

The top 8 perform.

The top 8 perform a group Broadway routine choreographed by Tyce Diorio to the music of "Cell Block Tango" from Chicago (musical). Viewer vote results eliminate 2 dancers. Busta Rhymes performs a medley.

Top 6 perform with randomly picked partners and dance styles, then a solo. Ivan and Natalie - jive and contemporary. Benji and Donyelle - Broadway and hip-hop. Travis and Heidi - smooth waltz and afro-pop.

Show opens with the top 6 contestants performing a contemporary piece, choreographed by Mia Michaels to the music of "Hide and Seek"-Imogen Heap. Musical guest, Omarion, sings "Entourage." Two contestants are eliminated.

Top 4 compete for the title of America's favorite dancer. Each contestant dances a solo, with each other and as a group. Benji and Travis dance with each other for the first time, was well as Heidi and Donyelle.

The top 20 perform. The final four perform solos and reprise their favorite routines, as well as four of the judges' favorites. America's favorite dancer is revealed. Ciara and Fergie perform. Celine Dion has a message for the winner.