The star with the lowest combined judges’ score and viewer votes was eliminated at the end of the episode.

After the stars performed their routines, which recalled iconic dances from previous seasons, four stars earned perfect scores: "The Secret Lives of Mormon Wives," star Whitney Leavitt; wildlife conservationist Robert Irwin; TV personality Alix Earle; and reality TV star Dylan Efron.

For the 20th anniversary episode, he danced to the same song his sister dedicated to their late father, Steve Irwin, when she competed on "DWTS."

Season 34 of Dancing With the Stars features relay dances, pairing celebrities with former champions, while judges score individual and head-to-head performances, shaping the leaderboard and eliminations.

A Tony winner, several Olympians, Super Bowl champions and Bachelorettes are just a few of the stars who have won the coveted mirrorball trophy throughout the show’s 20-year history.

In 20 years of 'Dancing With the Stars,' here are the 20 best breakout performances across seasons including many with Derek Hough, Mark Ballas & more

Whitney Leavitt and Mark Ballas closed Dancing with the Stars’ 20th-anniversary show with a flawless Argentine tango to “Cell Block Tango,” earning unanimous 10s and standing ovations in one of the se

The countdown to the winner of this season’s Len Goodman Mirrorball Trophy continued on week 9 of Dancing with the Stars, hosted by Alfonso Ribeiro and Julianne Hough, when the dance competition celebrated its “20th Birthday Party.” The seven remaining couples took to the ballroom floor with a remix of iconic performances from past seasons.

Lisa Ann Walter couldn't be more proud of best friend Elaine Hendrix as her Dancing With the Stars journey continues. "This is a stacked season," Walter, 62, told Us Weekly exclusively while attending the Paley Honors Fall Gala at the Beverly Hilton Hotel in Los Angeles on Monday0.

Dancing with the Stars airs on Tuesdays at 8 p.m. local time on ABC and Disney+ and streams the next day on Hulu. Disney+ offers a number of subscription options, so you can find the one that works for you. With ads, a subscription costs $10.99/month; without ads, it’s $18.99/month or $189.99/year.