Dancing with the Stars' four remaining celebrities have their work cut out for them as they're approaching the end of the Season 24 competition.

On the upcoming Monday, May 15 semifinals performance show on ABC, Rashad Jennings, Normani Kordei, Simone Biles, and David Ross will be tasked with learning two full dances.

First, the celebrity and professional pairings will each work closely with one of the Dancing with the Stars judges -- Julianne Hough, Carrie Ann Inaba, Len Goodman, or Bruno Tonioli.

In the special "Judges' Challenge," the judges will come up with a specific request for his or her assigned couple. When this challenge was done in the past, the judges came up with the entire creative concept, costumes included, for the routines.

In the second round of competition, each couple will perform a style of dance that is brand new to the celebrities. There's a first time for everything! The styles will be the rumba, quickstep, jazz, tango, jive, foxtrot or Viennese waltz.

In addition, longtime Dancing with the Stars pro Cheryl Burke will return to the dance floor with a special performance, and U.K. artist and songwriter Calum Scott will sing two songs.

Burke has won two mirrorball trophies and will perform a routine from her 30-city tour "Love on the Floor." Scott will sing a version of Robyn's "Dancing On My Own" while Witney Carson and Artem Chigvintsev dance together, and he'll also perform his new original song "Rhythm Inside."

At the end of the jam-packed night of entertainment, either Rashad and pro partner Emma Slater, Normani and partner Val Chmerkovskiy, Simone and partner Sasha Farber, or David and partner Lindsay Arnold will be eliminated.

Below is the list of dances the couples will perform and the judges who will assist for Round 1:

- Olympic gold medal-winning gymnast Simone Biles and pro Sasha Farber with the help of Carrie Ann Inaba: Jive to "Faith" by Stevie Wonder featuring Ariana Grande.

- NFL free agent Rashad Jennings and pro Emma Slater with the help of Bruno Tonioli: Rumba to "Say You Won't Let Go" by James Arthur.

- Fifth Harmony member Normani Kordei and pro Val Chmerkovskiy with the help of Len Goodman: Viennese Waltz to "Desperado" by Rihanna.
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- Two-time World Series Champion David Ross and pro Lindsay Arnold with the help of Julianne Hough: Foxtrot to "You Make Me Feel So Young" by Michael Buble.

Below is the list of dances and songs to be performed by the couples in Round 2:

- Simone Biles and Sasha Farber: Rumba to "Skyscraper" by Demi Lovato.

- Rashad Jennings and Emma Slater: Quickstep to "Yes I Can" by Superhumans.

- Normani Kordei and Val Chmerkovskiy: Jazz to "What a Wonderful World" by Ray Chew Live.

- David Ross and Lindsay Arnold: Tango to "Castle on the Hill" by Ed Sheeran.