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The opening number with the entire cast, choreographed by Lacey and Benji Schwimmer during 'Dancing with the Stars' on Monday, October 21, 2013. (ABC/Adam Taylor) ( 133534_7761 )

The opening number with the entire cast, choreographed by Lacey and Benji Schwimmer during 'Dancing with the Stars' on Monday, October 21, 2013. (ABC/Adam Taylor) ( 133534_7746 )

The opening number with the entire cast, choreographed by Lacey and Benji Schwimmer during 'Dancing with the Stars' on Monday, October 21, 2013. (ABC/Adam Taylor) ( 133534_7767 )

The opening number with the entire cast, choreographed by Lacey and Benji Schwimmer during 'Dancing with the Stars' on Monday, October 21, 2013. (ABC/Adam Taylor) ( 133534_7750 )

Emma Slater and Bill Engvall perform during 'Dancing with the Stars' on Monday, October 21, 2013. (ABC/Adam Taylor) ( 133534_7775 )

Emma Slater and Bill Engvall perform during 'Dancing with the Stars' on Monday, October 21, 2013. (ABC/Adam Taylor) ( 133534_7790 )

Emma Slater and Bill Engvall perform during 'Dancing with the Stars' on Monday, October 21, 2013. (ABC/Adam Taylor) ( 133534_7796 )

Emma Slater and Bill Engvall perform during 'Dancing with the Stars' on Monday, October 21, 2013. (ABC/Adam Taylor) ( 133534_7800 )

Emma Slater and Bill Engvall listen to the judges comments during 'Dancing with the Stars' on Monday, October 21, 2013. (ABC/Adam Taylor) ( 133534_7823 )

Elizabeth Berkeley Lauren and Val Chmerkovskiy perform during 'Dancing with the Stars' on Monday, October 21, 2013. (ABC/Adam Taylor) ( 133534_7839 )

Elizabeth Berkeley Lauren and Val Chmerkovskiy perform during 'Dancing with the Stars' on Monday, October 21, 2013. (ABC/Adam Taylor) ( 133534_7840 )

Elizabeth Berkeley Lauren and Val Chmerkovskiy perform during 'Dancing with the Stars' on Monday, October 21, 2013. (ABC/Adam Taylor) ( 133534_7882 )

Elizabeth Berkeley Lauren and Val Chmerkovskiy perform during 'Dancing with the Stars' on Monday, October 21, 2013. (ABC/Adam Taylor) ( 133534_7899 )

Elizabeth Berkeley Lauren and Val Chmerkovskiy perform during 'Dancing with the Stars' on Monday, October 21, 2013. (ABC/Adam Taylor) ( 133534_7916 )

Judges Carrie Ann Inaba, Len Goodman and Bruno Tonioli give the first perfect score to Elizabeth Berkeley Lauren and Val Chmerkovskiy during 'Dancing with the Stars' on Monday, October 21, 2013. (ABC/Adam Taylor) ( 133534_7922 )

Leah Remini and Tony Dovolani perform during 'Dancing with the Stars' on Monday, October 21, 2013. (ABC/Adam Taylor) ( 133534_7952 )

Leah Remini and Tony Dovolani perform during 'Dancing with the Stars' on Monday, October 21, 2013. (ABC/Adam Taylor) ( 133534_7958 )

Leah Remini and Tony Dovolani perform during 'Dancing with the Stars' on Monday, October 21, 2013. (ABC/Adam Taylor) ( 133534_7989 )

Leah Remini and Tony Dovolani perform during 'Dancing with the Stars' on Monday, October 21, 2013. (ABC/Adam Taylor) ( 133534_7999 )

Leah Remini and Tony Dovolani listen to the judges comments during 'Dancing with the Stars' on Monday, October 21, 2013. (ABC/Adam Taylor) ( 133534_8007 )

Host Brook Burke-Charvet with Peta Murgatroyd and Brant Daugherty perform 'Dancing with the Stars' on Monday, October 21, 2013. (ABC/Adam Taylor) ( 133534_8030 )

Peta Murgatroyd and Brant Daugherty perform during 'Dancing with the Stars' on Monday, October 21, 2013. (ABC/Adam Taylor) ( 133534_8038 )

Peta Murgatroyd and Brant Daugherty perform during 'Dancing with the Stars' on Monday, October 21, 2013. (ABC/Adam Taylor) ( 133534_8057 )

Peta Murgatroyd and Brant Daugherty perform during 'Dancing with the Stars' on Monday, October 21, 2013. (ABC/Adam Taylor) ( 133534_8066 )

Peta Murgatroyd and Brant Daugherty perform during 'Dancing with the Stars' on Monday, October 21, 2013. (ABC/Adam Taylor) ( 133534_8078 )

Host Tom Bergeron with Lacey Schwimmer during 'Dancing with the Stars' on Monday, October 21, 2013. (ABC/Adam Taylor) ( 133534_8128 )

Amber Riley performs during 'Dancing with the Stars' on Monday, October 21, 2013. (ABC/Adam Taylor) ( 133534_8157 )

Amber Riley and Derek Hough perform during 'Dancing with the Stars' on Monday, October 21, 2013. (ABC/Adam Taylor) ( 133534_8182 )

Amber Riley and Derek Hough perform during 'Dancing with the Stars' on Monday, October 21, 2013. (ABC/Adam Taylor) ( 133534_8223 )

Amber Riley and Derek Hough perform during 'Dancing with the Stars' on Monday, October 21, 2013. (ABC/Adam Taylor) ( 133534_8213 )

Amber Riley and Derek Hough during 'Dancing with the Stars' on Monday, October 21, 2013. (ABC/Adam Taylor) ( 133534_8240 )

Cheryl Burke and Jack Osbourne perform during 'Dancing with the Stars' on Monday, October 21, 2013. (ABC/Adam Taylor) ( 133534_8289 )

Cheryl Burke and Jack Osbourne perform during 'Dancing with the Stars' on Monday, October 21, 2013. (ABC/Adam Taylor) ( 133534_8297 )

Cheryl Burke and Jack Osbourne perform during 'Dancing with the Stars' on Monday, October 21, 2013. (ABC/Adam Taylor) ( 133534_8278 )

Cheryl Burke and Jack Osbourne perform during 'Dancing with the Stars' on Monday, October 21, 2013. (ABC/Adam Taylor) ( 133534_8302 )

Cheryl Burke and Jack Osbourne listen to the judges comments during 'Dancing with the Stars' on Monday, October 21, 2013. (ABC/Adam Taylor) ( 133534_8337 )

Nicole 'Snooki' Polizzi and Sasha Farber perform during 'Dancing with the Stars' on Monday, October 21, 2013. (ABC/Adam Taylor) ( 133534_8346 )

Nicole 'Snooki' Polizzi and Sasha Farber perform during 'Dancing with the Stars' on Monday, October 21, 2013. (ABC/Adam Taylor) ( 133534_8354 )

Nicole 'Snooki' Polizzi and Sasha Farber perform during 'Dancing with the Stars' on Monday, October 21, 2013. (ABC/Adam Taylor) ( 133534_8382 )

Nicole 'Snooki' Polizzi and Sasha Farber perform during 'Dancing with the Stars' on Monday, October 21, 2013. (ABC/Adam Taylor) ( 133534_8396 )

Nicole 'Snooki' Polizzi and Sasha Farber listen to the judges comments during 'Dancing with the Stars' on Monday, October 21, 2013. (ABC/Adam Taylor) ( 133534_8410 )

Karina Smirnoff and Corbin Bleu perform during 'Dancing with the Stars' on Monday, October 21, 2013. (ABC/Adam Taylor) ( 133534_8427 )

Karina Smirnoff and Corbin Bleu perform during 'Dancing with the Stars' on Monday, October 21, 2013. (ABC/Adam Taylor) ( 133534_8434 )

Karina Smirnoff and Corbin Bleu perform during 'Dancing with the Stars' on Monday, October 21, 2013. (ABC/Adam Taylor) ( 133534_8452 )

Karina Smirnoff and Corbin Bleu perform during 'Dancing with the Stars' on Monday, October 21, 2013. (ABC/Adam Taylor) ( 133534_8468 )

Karina Smirnoff and Corbin Bleu during 'Dancing with the Stars' on Monday, October 21, 2013. (ABC/Adam Taylor) ( 133534_8508 )

Mika and Ariana Grande perform during 'Dancing with the Stars' on Monday, October 21, 2013. (ABC/Adam Taylor) ( 133534_8565 )

Mika and Ariana Grande perform during 'Dancing with the Stars' on Monday, October 21, 2013. (ABC/Adam Taylor) ( 133534_8563 )

Mika and Ariana Grande perform during 'Dancing with the Stars' on Monday, October 21, 2013. (ABC/Adam Taylor) ( 133534_8586 )

The couples get their groups before the 'Switch-Up Challenge' during 'Dancing with the Stars' on Monday, October 21, 2013. (ABC/Adam Taylor) ( 133534_0330 )

The couples perform in the 'Switch-Up Challenge' during 'Dancing with the Stars' on Monday, October 21, 2013. (ABC/Adam Taylor) ( 133534_0365 )

Cheryl Burke and Jack Osbourne perform in the 'Switch-Up Challenge' during 'Dancing with the Stars' on Monday, October 21, 2013. (ABC/Adam Taylor) ( 133534_8610 )

Karina Smirnoff and Corbin Bleu perform in the 'Switch-Up Challenge' during 'Dancing with the Stars' on Monday, October 21, 2013. (ABC/Adam Taylor) ( 133534_8620 )

The couples perform in the 'Switch-Up Challenge' during 'Dancing with the Stars' on Monday, October 21, 2013. (ABC/Adam Taylor) ( 133534_0335 )

Nicole 'Snooki' Polizzi and Sasha Farber perform in the 'Switch-Up Challenge' during 'Dancing with the Stars' on Monday, October 21, 2013. (ABC/Adam Taylor) ( 133534_8644 )

Elizabeth Berkeley Lauren and Val Chmerkovskiy perform in the 'Switch-Up Challenge' during 'Dancing with the Stars' on Monday, October 21, 2013. (ABC/Adam Taylor) ( 133534_8713 )

The couples perform in the 'Switch-Up Challenge' during 'Dancing with the Stars' on Monday, October 21, 2013. (ABC/Adam Taylor) ( 133534_8742 )

The couples perform before the 'Switch-Up Challenge' during 'Dancing with the Stars' on Monday, October 21, 2013. (ABC/Adam Taylor) ( 133534_8596 )

Amber Riley and Derek Hough perform in the 'Switch-Up Challenge' during 'Dancing with the Stars' on Monday, October 21, 2013. (ABC/Adam Taylor) ( 133534_8770 )

Peta Murgatroyd and Brant Daugherty perform in the 'Switch-Up Challenge' during 'Dancing with the Stars' on Monday, October 21, 2013. (ABC/Adam Taylor) ( 133534_8788 )

Amber Riley and Derek Hough perform in the 'Switch-Up Challenge' during 'Dancing with the Stars' on Monday, October 21, 2013. (ABC/Adam Taylor) ( 133534_8813 )

The couples wait to hear if they are safe or in jeopardy during 'Dancing with the Stars' on Monday, October 21, 2013. (ABC/Adam Taylor) ( 133534_0383 )

Elizabeth Berkeley Lauren and Val Chmerkovskiy react to being safe during 'Dancing with the Stars' on Monday, October 21, 2013. (ABC/Adam Taylor) ( 133534_8842 )

Amber Riley and Derek Hough react to being safe during 'Dancing with the Stars' on Monday, October 21, 2013. (ABC/Adam Taylor) ( 133534_8849 )

Peta Murgatroyd and Brant Daugherty react to being safe during 'Dancing with the Stars' on Monday, October 21, 2013. (ABC/Adam Taylor) ( 133534_8854 )

Leah Remini and Tony Dovolani react to being safe during 'Dancing with the Stars' on Monday, October 21, 2013. (ABC/Adam Taylor) ( 133534_8855 )

Karina Smirnoff and Corbin Bleu react to being safe during 'Dancing with the Stars' on Monday, October 21, 2013. (ABC/Adam Taylor) ( 133534_8860 )

Nicole 'Snooki' Polizzi and Sasha Farber react to being safe during 'Dancing with the Stars' on Monday, October 21, 2013. (ABC/Adam Taylor) ( 133534_8863 )

Cheryl Burke and Jack Osbourne react to being safe during 'Dancing with the Stars' on Monday, October 21, 2013. (ABC/Adam Taylor) ( 133534_8878 )

Emma Slater and Bill Engvall react to being safe during 'Dancing with the Stars' on Monday, October 21, 2013. (ABC/Adam Taylor) ( 133534_8886 )

All the couples celebrate to safe due to a voting technical problem during 'Dancing with the Stars' on Monday, October 21, 2013. (ABC/Adam Taylor) ( 133534_8889 )