India, Nov. 12 -- Robert Irwin and Witney Carson scored a perfect 40 out of 40 on November 11 during the 20th anniversary celebration of Dancing with the Stars. The wildlife conservationist, who danced a foxtrot to "Footprints in the Sand" by Leona Lewis, was inspired by his sister's Season 21 tribute to their late father, Steve Irwin, per Entertainment Weekly.

Robert Irwin paid tribute to his late father, Steve Irwin, an Australian zookeeper and conservationist, on the 20th anniversary of Dancing with the Stars. He took inspiration from his sister Bindi Irwin's performance from season 21. After Irwin and Carson's dance, Bindi joined the duo on stage and wrapped her arms around her brother.

Like everyone else, the judges thoroughly enjo...