Six couples remain in the battle for the Mirror Ball Trophy in "Dancing with the Stars" season 21. The competition continues to heat up on the dance floor and in Week 9, the pairs will dance not one but two routines, the second one they will do alongside another duo.

For the individual routines, viewers will see the contestants groove to hits of some of the most popular artists today including the latest music from Justin Bieber and Ed Sheeran. Here is the complete rundown of the pairs and their respective songs:

• Bindi Irwin and Derek Hough: "Roses and Violets" by Alexander Jean
• Alexa PenaVega and Mark Ballas: "Make it Rain" by Ed Sheeran
• Carlos PenaVega and Witney Carson: "What Do You Mean" by Justin Bieber
• Nick Carter and Sharna Burgess: "A Cool Cat in Town" by Tape Five
• Tamar Braxton and Val Chmerkovskiy: "Wicked Game" by James Vincent McMorrow
• Alek Skarlatos and Lindsay Arnold: "Back It Up" by Prince Royce featuring Jennifer Lopez and Pitbull

Week 9 of "Dancing with the Stars" season 21 will also see the remaining couples huddle up into three teams for Dance Duets. Here, they will have to pull off knockout showings to the tune of some unique and not to mention classic hits.

Alexa and Mark together with Bindi and Derek will perform a Charleston routine inspired by "Chicago" with the song "All That Jazz/Hot Honey Rag." To do some Paso Doble to the accompaniment of legendary rock band Queen's "We Will Rock You" are Alek and Lindsay and Carlos and Witney.

Nick and Sharna with Tamar and Val will have The Beatles Love going on in their "Cirque De Soleil" Rumba routine for "Hey Jude." Talking to Glamour, Sharna revealed that what they are about to do is "a whole new challenge that we've never done," which makes this week extra exciting.

"Dancing with the Stars" season 21 Week 9 airs Nov. 9 at 8 p.m. on ABC.