The singer and former Disney Channel star and van Amstel finished in first place on the special two-week judges' leaderboard, which combined last night's judges' scores with the scores the couples had received from their individual and "Team Dance" routines last week, during Dancing with the Stars' fifteenth-season seventh performance show on ABC Monday night.
Last night's broadcast featured each All-Star couple dancing an individual routine which allowed the celebrity in each pairing to step forward and perform a small solo.
Soap star Kelly Monaco and partner Val Chmerkovskiy finished in eighth -- and last -- place on the two-week leaderboard. They danced a tango routine which received 27 points from the judges -- which, when combined with the 51.5 points they had earned last week, gave the couple a total score of 78.5 points.
Olympic gold medalist speed skater Apolo Anton Ohno and partner Karina Smirnoff finished in second place on the judges' leaderboard with 86.5 total points. The couple earned a perfect score of 30 points for their Viennese waltz on Monday night and a combined score of 56.5 for their individual routine and "Team Dance" last week.
Third place on the judges' leaderboard went to reality TV star Melissa Rycroft and partner Tony Dovolani after they racked up a total of 86 points over the course of the last two weeks. Combined with the 56.5 points they had previously received, the couple also earned 29.5 points for their Viennese waltz this week.
Olympic gold medalist gymnast Shawn Johnson and partner Derek Hough finished with a total of 84.5 points, landing them in fourth place on the judges' leaderboard. They danced a cha cha which received 28 points from the judges. Those 28 points were added to their overall score of 56.5 from last week.
Sixth place on the leaderboard went to NFL football star Emmitt Smith and partner Cheryl Burke after they received a total of 82.5 points. Added to their score of 56 from last week, the couple also received 26.5 points from the judges for their foxtrot routine.
Actress Kirstie Alley and partner Maksim Chmerkovskiy finished in seventh place on the judges' leaderboard after they danced a rumba worthy of 27.5 points -- which, when combined with the 52.5 points they had earned last week, gave the couple a total score of 80 points.
However, Alley and Maksim Chmerkovskiy actually ended up walking away from Monday night with an overall score of 82 points. After all the All-Star couples performed in one big freestyle group dance, Alley and her partner were awarded two additional bonus points from the judges for giving a standout solo performance mid-routine.
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Dancing with the Stars judges' scores and home viewer votes from last week's two performance shows and Monday night's show will now be combined. During tonight's Dancing with the Stars: All-Stars results show, one couple will be eliminated.