Each finalist will be performing five times, three with one of the other finalists, one solo and one group performance. This week's guest judge is Mandy Moore.
First up are Courtney Galiano and Twitch Boss with a Hip-Hop routine to "Church" by T-Pain with Teddy Verseti. Mary did her big scream at the end twice!
Courtney then dances the night's first solo to "They Weren't There" by Missy Higgins.
The second team to dance are the superstar duo of Katee Shean and Joshua Allen! They're dancing a Romance routine to "Slow Dancing in a Burning Room" by John Mayer.
Third, Katee and Courtney go Broadway and dance to "The Trolley Song" by Rufus Wainwright.
The second solo of the night is performed by Twitch, and he's dancing to "It Was All In Your Mind" by Wade Robson.
The fourth couple dance is done by Joshua and Twitch. This time, they're doing a Russian Tremor to "Trepak" from "The Nutcracker Suite". These two guys allegedly have a rivalry going on and this dance's purpose was to settle the score. Since the show thought this was one of the toughest routines to date, Mary did her scream!
Katee then has the right to perform solo #3, this one being done to "Hide and Seek" by Imogen Heap.
Katee and Twitch have the next dance, a Fox Trot, to "Feeling Good" by Michael Buble.
Joshua then performs the night's last solo, with the background song being "(Not Just) Knee Deep" by Funkadelic.
In the last couples dance of the season, Courtney and Joshua perform the Jive to "The Dirty Boogie" by the Brian Setzer Orchestra.
To wrap up the show, the final four all danced to "Hallelujah" by the Vitamin String Quartet.