"Dancing with the Stars" season 21 eliminated neither of the bottom two couples last week. However, the show said goodbye to Kim Zolciak-Biermann, who was forced to withdraw from the competition after suffering a mini-stroke. Tony Dovolani was her pro partner.

Only 10 couples move on to Week 4 of the competition, and this week will be all about the celebs and dance pros' most memorable years. With this at the theme, viewers can expect exciting and warm performances from the contestants.

Last week, couples Alexa and Mark and Nick and Sharna earned the highest score – 36 out of 40. The latter couple is observing the Most Memorable Year theme by performing a routine to the tune of "Everybody," a hit song from the Backstreet Boys, the boyband that catapulted Nick to stardom.

Gary Busey, with the help of pro partner Anna Trebunskaya, will be celebrating the music of the late singer-songwriter and rock and roll icon Buddy Holly, whom Busey played as in a 1978 movie about the musician's life.

Here is the complete rundown of the couples and their respective song selections:

• Alek Skarlatos & Lindsay Arnold – "Wake Me Up" by Avicii f. Aloe Blacc
• Alexa PenaVega & Mark Ballas – "Mama Said" by The Shirelles
• Andy Grammer & Allison Holker – "Good to be Alive" by Andy Grammer
• Bindi Irwin & Derek Hough – "Every Breath You Take" by Aaron Krause f. Liza Anne
• Carlos PenaVega & Witney Carson – "Amazing Grace" by Ray Chew Live
• Gary Busey & Anna Trebunskaya – "That'll Be the Day" by Buddy Holly
• Hayes Grier & Emma Slater – "Stitches" by Shawn Mendes
• Nick Carter & Sharna Burgess – "Everybody (Backstreet's Back)" by Backstreet Boys
• Paula Deen & Louis van Amstel – "Respect" by Aretha Franklin
• Tamar Braxton & Valentin Chmerkovskiy – "King" by Tamar Braxton

"Dancing with the Stars" season 21 Week 4 airs on Monday, Oct. 5 and Tuesday, Oct. 6. Meanwhile voting is now open for the Switch Up, which will take place in week 5.