It’s that time again, when one lucky couple from the ABC series “Dancing With the Stars” will get crowned king and queen of the ballroom! But viewers of the long-running competition series can expect much more to go down on the dance floor during the Season 20 finale than just finding out who will walk away with the coveted Mirrorball Trophy.

"DWTS" will kick off the final week of the 2015 installment on Monday, May 18, at 8 p.m. EDT on ABC with an hour-long show that will feature two performances from each of the remaining three couples (Noah Galloway and Sharna Burgess, Riker Lynch and Allison Holker, and Rumer Willis and Val Chmerkovskiy). However, the winners of "DWTS" will be revealed during Tuesday night’s two-hour installment, which will air May 19 at a new time: 9 p.m. EDT to 11 p.m. EDT, on ABC. ("The Bachelorette" will air at the usual "DWTS" time of 8 p.m. EDT on Tuesday.)

Not only will the show include a “high-energy reunion” featuring every couple from Season 20, but the star-studded finale of the 10-year anniversary installment will also have numerous singers belting out tunes Tuesday night. According to ABC, Season 20 contestants Redfoo and Patti LaBelle will each perform one of their hits. Andy Grammer will also return to the dancing series, providing the soundtrack to Nastia Liukin and Derek Hough’s Charleston to “Honey, I’m Good.”

Sia will also take the stage to perform her chart-topping single “Elastic Heart” as siblings Derek and Julianne Hough shake it out on the dance floor to the pop song in a special performance. And lastly, it was revealed that Jason Derulo will sing his foot-tapping song “Want to Want Me” in the final episode of the 2015 series.

Viewers can also expect the return of favorites from previous seasons of “DWTS” to slip back into their dancing shoes for the finale. “Amy Purdy, Alfonso Ribeiro and Sadie Robertson return to the ballroom for special performances,” the finale synopsis teased.

“In the last element of the competition, the remaining couples will perform a new routine as part of a ‘24 Hour Fusion Challenge,’ ” the summary states. The task, which will begin Monday night, will require the three couples to “fuse two contrasting dance styles” that they’ve previously performed throughout the season in less than 24 hours. Talk about pressure!

Are you looking forward to the Season 20 finale of “Dancing With the Stars”? Make sure to tune in to the final episode of the 2015 installment on Tuesday, May 19, at 9 p.m. EDT on ABC.