Only three pairs are left in "Dancing With the Stars" season 20, which means that predictions are starting to run wild on who will get this year's highly coveted Mirror Ball Trophy.

The two-part grand finale of the hit celebrity dance reality competition will begin with Monday's final performance night for the three remaining pairs, namely: actress-singer Rumer Willis and partner Val Chmervoskiy; personal trainer Noah Galloway and pro dancer Sharna Burgess; and singer-actor Riker Lynch and Allison Holker. 

During the one-hour duration of the show, the pairs will perform a repeat of one of their best numbers this season as well as a new freestyle dance. While the numbers are still kept as a secret at this point, rumors claim that Willis and Chmervoskiy will sing and dance to Britney Spears' hit tune "Toxic." 

After the competition, the judges of the show will give out their scores and the audience will be given a 24-hour time allotment to pick who among the finalists deserves to win the 20^th Mirror Ball trophy, which will be announced during the second part of the finale on Tuesday. 

According to the predictions posted by Sports Bovada, Bruce Willis and Demi Moore's daughter and her partner is on top of the odds chart, with 2-5 odds in favor of earning the championship this year. The pair is followed by the Lynch-Holker duo, who has a 7-4 chance of winning. The third dancing couple, Galloway and Burgess, has a 12-1 chance of being declared as this season's winners. 

Even the producers of the show believe that Willis will win the trophy.

A source from Hollywood Life said, "She really has been the most consistent. But they also have seen Noah's fan base and they are rabid." 

But before the show announces who the winner is, reports claim that girl group Fifth Harmony is slated to perform their hit single "Worth It" during the final episode of the show.