Bindi Irwin and Derek Hough - Halloween Night - Argentine Tango - Week 7 featuring: Jenna Johnson, Hayley Erbert, Alan Bersten, Brittany Cherry and Sasha .\rbr\rbrBindi Irwin & Derek Hough - Vampire Queen Argentine Tango - Halloween Night - DWTS Season 21 Week 7.\rbr\rbrBindi Irwin & Derek Hough - Vampire Queen Argentine Tango - Halloween Night - DWTS Season 21 Week 7.\rbr\rbrDWTS Season 21 Week 7.