The fourth season begins with 11 contestants, including Laila Ali, Billy Ray Cyrus, Clyde Drexler, Joey Fatone, Shandi Finnessey, Leeza Gibbons, Heather Mills, Apolo Anton Ohno, John Ratzenberger, Paulina Porizkova and Ian Ziering. Hosted by Tom Bergeron and Samantha Harris.

The 11 contestants dance the mambo and the quickstep.

A recap of the season up to now is shown.

The first pair are eliminated after two rounds of competition. Also: Dionne Warwick performs; eight professionals dance the jive to Queen's "Don't Stop Me Now".

Third-round competition includes the jive and the tango.

Third-round results. Also: Ciara sings "Like a Boy"; Tony Dovolani and Julianne Hough dance while Josh Groban sings "So She Dances"; and Survivor performs "Eye of the Tiger" while the pros do a group paso doble.

Fourth-round competition includes the paso doble and the waltz.

The results from last nights show are revealed. Also, a recap of the fourth season so far.

Fifth-round competition includes the samba and the rumba.

Fifth-round results. Also: Macy Gray performs the song "Finally Made Me Happy"; Season 2 contestant Lisa Rinna joins six other dancers for a number from "Chicago"; and dancer Louis van Amstel takes the stage for "Zoot Suit Riot".

The stars dance to an individual Latin dance and a group Swing dance.

A special musical performance by Joss Stone and fourteen members from the cast of Dreamgirls is performed. The next contestant is voted off.

Seventh-round competition includes a ballroom dance and a Latin dance from each couple.

Seventh-round results. Also: Meat Loaf performs his classic "Bat Out of Hell" and "Cry Over Me" from his new album, "Bat Out of Hell III: The Monster Is Loose"; former contestants Jerry Rice and Kenny Mayne appear; and Jimmy Kimmel demonstrates the cha-cha.

Eighth-round competition includes a ballroom dance and a Latin dance from each couple.

Eighth-round results. Also: Nelly Furtado performs "All Good Things" and "I'm Like a Bird"; Maksim Chmerkovskiy participates in a dance-off against his brother Val; and Jimmy Kimmel demonstrates the waltz.

Ninth-round competition features the four remaining couples performing their favorite dances, but with new music and choreography.

Ninth-round results. The fourth season concludes next week. Also, Enrique Iglesias sings "Hero" and "Do You Know"; flamenco dancer Joaquín Cortés performs.

Laila, Joey and Apolo will each perform two dances this week. This week will have a judges choice dance style and a freestyle dance.

The remaining couple dance one last dance for the judges, which will be added to last nights vote to determine this season's winner. Each of this season's couples come back for one last dance for the audience.