Halloween costumes of celebrities (2011)

Slideshow posted in Photos | Saturday, October 29, 2011

16 of 39: 'Poison ivy .. Ha,' 'Dancing With The Stars' pro Derek Hough wrote on his official Twitter page on October 29, 2011. He is seen posing next to his sister Julianne Hough who was dressed like the Batman villain. ( Photo / Twitter.com/derekhough)