Dancing with the Stars: All-Stars' Week 5 leaderboard has been topped by actor Gilles Marini and professional partner Peta Murgatroyd, but that may change during tonight's additional one-hour performance show.

The actor and Murgatroyd finished in first place on the judges' leaderboard during Dancing with the Stars' fifteenth-season fifth performance show on ABC Monday night.

The couple topped the leaderboard after they received 29.5 out of 30 possible points from Dancing with the Stars' new scoring system, which features 0.5 intervals for the first time in the show's history, for their rumba routine from Dancing with the Stars judges Len Goodman, Carrie Ann Inaba and Bruno Tonioli.

Due to last night's presidential debate, there will be not be a Dancing with the Stars: All-Stars elimination this week. Instead, the show split its usual two-hour weekly performance show into one-hour performance shows on both Monday and Tuesday nights. Half the eight remaining couples performed their individual "guilty pleasure" routines last night, while the other four couples are set to take the stage tonight with their individual dances. 

NFL football star Emmitt Smith and partner Cheryl Burke finished in second place on Monday night's leaderboard following their samba routine which received 29 points from the judges.

Third place on the leaderboard went to actress Kirstie Alley and partner Maksim Chmerkovskiy after they earned 25.5 points for their quickstep dance routine from the judges.

Soap star Kelly Monaco and partner Val Chmerkovskiy claimed fourth -- and last -- place at the bottom of the leaderboard after they performed a samba routine which received only 24.5 points from the judges.

In addition, the four couples who did not perform their individual routines last night performed their freestyle "Team Dance" performance instead.

Reality TV star Melissa Rycroft --who was able to dance after suffering a herniated disk during rehearsal -- singer and former Disney Channel star Sabrina Bryan, Olympic gold medalist speed skater Apolo Anton Ohno, and Olympic gold medalist gymnast Shawn Johnson and their partners earned a total score of 29.5 out of 30 possible points from the judges for their freestyle "Team Dance."

The same format will be utilized again in tonight's show with Marini, Monaco, Alley, and Smith performing their "Team Dance" together alongside their respected partners, while the other four couples will perform their individual routines. The "Team Dance" and individual dance scores will be added together to give each celebrity and professional pairing an overall score.

Dancing with the Stars judges' scores and home viewer votes from Monday and Tuesday night will be added to next week's scores and votes. Then, next Tuesday night, one Dancing with the Stars: All-Stars couple will be eliminated based upon the combination of results over the two-week period.
About The Author: Elizabeth Kwiatkowski
Elizabeth Kwiatkowski is Associate Editor of Reality TV World and has been covering the reality TV genre for more than a decade.