Robert Irwin had the entire ballroom in tears during Dancing With the Stars' Dedication Night. The 21-year-old Australian conservationist dedicated his dance on Tuesday, October 14, to his mom, Terri Irwin, who raised him and sister Bindi Irwin as a single parent after dad Steve Irwin's death in 2006. Robert and his pro partner, Witney Carson, performed a touching contemporary routine to the song "You'll Be in My Heart" by Phil Collins - which Terri, 61, joined at the end. The mother-son duo shared an emotional moment as they embraced on the dance floor.