Stephen Amell & Derek Hough Announced For 'American Nina Warrior' Celebrity Edition

American Nina Warrior is bringing in famous competitors! The NBC competition show just announced its first-ever celebrity edition, according to TVGuide.com. Arrow‘s Stephen Amell is set to compete, which was spoiled last month. He will be facing off against Dancing with the Stars alum Derek Hough, Parenthood‘s Erika Christensen, Today‘s Natalie Morales, comedian Nikki Glaser,