The 17th season of Dancing With the Stars aired its sixth episode Monday night, which included the celebrities performing an unlearned dance as well as the "Shake-Up Challenge."

Comedian Bill Engvall and his partner Emma Slater danced an island-themed tango. Judge Bruno Tonioli said he lost some of the smoothness of the tango while Carrie Ann Inaba liked their combination of humor and passion. The judges gave them a score of 23 out of 30.

Actress Elizabeth Berkley Lauren danced the cha-cha-cha with partner Val Chmerkovskiy. Inaba compared the actress to a white panther while Len Goodman called her and Chmerkovskiy a "formidable partnership." The judges gave them a 30 out of 30, the first perfect score of the entire season.

Dancing the quickstep, actress Leah Remini and partner Tony Dovolani impressed the judges in comparison to last week. Goodman said they "shot way up" from their dance last week while Tonioli said she had become "another Leah." The judges gave the couple a score of 27 out of 30.

Pretty Little Liars actor Brant Daugherty danced the tango with partner Peta Murgatroyd. Tonioli said he liked Daugherty's aggression and Inaba said the couple was incredible on a technical level. The judges gave them a score of 28 out of 30.

Glee star Amber Riley and partner Derek Hough danced an energetic samba, bringing the audience to their feet. Inaba said their dance was "a turn on" while Goodman said that their dance was "a tad repetitive." The judges gave the couple a score of 28 out of 30.

Dancing the paso doble, reality star Jack Osbourne and partner Cheryl Burke performed with a fiery background. Goodman said that most of the dance was top notch while Tonioli said that Osbourne's timing was off in places. The judges gave them a score of 25 out of 30.

Reality star Nicole "Snooki" Polizzi danced the foxtrot with partner Sasha Farber. Tonioli said that Polizzi had never been so elegant before and Inaba said that she had improved the most out of all the dancers. The judges gave the couple a score of 27 out of 30.

High School Musical star Corbin Bleu and partner Karina Smirnoff danced the Viennese waltz to the Game of Thrones theme song. Inaba said that their passion worked in the performance while Goodman said he didn't feel it was enough of a Viennese Waltz. The judges gave them a score of 23 out of 30.

The couples then participated in the Switch-Up Challenge. This involved the couples being split up into two groups of four. They then had to dance with rapidly changing music, having to improvise their dances to the music. The judges then eliminated one couple until only one was left. The first couple eliminated received one point added to their score, the second received two, the third received three and the final couple received four points.

In the first group, Engvall was eliminated first, followed by Osbourne and then Polizzi, with Bleu being the ultimate winner. In the second group, Remini was eliminated first, followed by Berkley, then Daugherty, with Riley being the winner.

Hosts Tom Bergeron and Brooke Burke-Charvet revealed which couples were safe and which were in danger of elimination. The hosts announced that none of the couples were being eliminated since there were technical difficulties involved in last week's public vote.

All eight couples will be dancing again on Monday, Oct. 28 at 8 p.m. on ABC.

Tags: Dancing with the Stars Dancing With the Stars Season 17