EIGHT REMAINING COUPLES TAKE ON THE "SWITCH-UP CHALLENGE" ON ABC'S "DANCING WITH THE STARS," MONDAY OCTOBER 21

Musical Guest Ariana Grande and Mika to Perform Their Hit Duet "Popular"

"Episode 1706" - Eight remaining couples hit the dance floor and face an exciting new challenge on "Dancing with the Stars," MONDAY, OCTOBER 21 (8:00-10:01 p.m., ET). Each couple will compete in an individual dance style they have not yet done as well as take part in the first ever "Switch-Up Challenge." In this fresh take on a dance marathon, couples will compete side by side, in two rounds, with no prior knowledge of dance style or musical accompaniment. One by one, the judges will select couples to be tapped-off/removed from the dance floor. Extra judges' points will be awarded to couples based on longevity. The show will also feature a spectacular opening number with the entire cast, choreographed by Lacey and Benji Schwimmer. Additionally, musical guest Ariana Grande and Mika will perform their hit duet "Popular." At the end of the night, one couple will face elimination.

Hosted by Emmy(R) Award-winning host Tom Bergeron ("America's Funniest Home Videos") and Brooke Burke-Charvet ("Dancing with the Stars" Season 7 Champion), "Dancing with the Stars" is the hit series in which celebrities perform choreographed dance routines which are judged by renowned ballroom judge Len Goodman and dancer/choreographers Bruno Tonioli and Carrie Ann Inaba.

Viewers may cast their votes for their favorite teams via phone on Monday nights during and up to 60 minutes after the end of the "Dancing with the Stars" broadcast in each time zone. Online voting at www.ABC.com and on Facebook at www.facebook.com/dancingwiththestars is open for 24 hours, beginning from the start of each episode on the East Coast at 8:00 p.m., ET/5:00 p.m., PT and closing at 8:00 p.m., ET/5:00 p.m., PT on Tuesday evenings. For the final week, on Monday, November 25, online voting will open for 15 hours, beginning from the start of the episode on the East Coast at 8:00 p.m., ET/5:00 p.m., PT and closing at 11:00 a.m., ET/8:00 a.m., PT the next day. A custom Facebook app lets fans vote, share whom they voted for and say why, as well as see whom friends voted for.

"Dancing with the Stars" is produced by BBC Worldwide Productions. Conrad Green, Ashley Edens-Shaffer and Joe Sungkur are executive producers. Alex Rudzinski directs. "Dancing with the Stars" is broadcast in 720 Progressive (720P), ABC's selected HDTV format, with 5.1 channel surround sound. This program carries a TV-PG, L parental guideline.

About BBC Worldwide Productions

BBC Worldwide Productions is one of five core businesses under BBC Worldwide America, the U.S. division of the main commercial arm and wholly-owned subsidiary of the British Broadcasting Corporation (BBC), BBC Worldwide. Led by Jane Tranter, BBC Worldwide Productions is based in Los Angeles and develops and produces scripted and non-scripted projects for U.S. cable and broadcast networks, as well as digital platforms. The production company is responsible for various titles including the upcoming "Getting On" (HBO), "Criminal Justice" (HBO), "Us & Them" (FOX), "Americans in Bed" (HBO), as well as "Top Gear" (HISTORY), "What Not to Wear" (TLC), "Richard Hammond's Crash Course" (BBC AMERICA), "Torchwood: Miracle Day" (Starz) and the cultural phenomenon "Dancing with the Stars" (ABC).