Julianne and Derek Hough Have a Thanksgiving Dance War You Need to Watch

Julianne and Derek Hough gave us a glimpse into their family festivities on Thursday by posting a series of Instagram videos showing off their annual "dance war." Besides being brother and sister, the two are widely known for their ridiculously impressive dance moves - and their collective judging and choreography work on Dancing With the Stars - and made sure to show them off alongside their sisters, nieces, and nephews. While most of the videos are set to the tune of Pitbull's "Fireball," ther...