By Brandy McDonnellFeatures writerbmcdonnell@oklahoman.comDespite what you see on TV, Keagan Capps doesn't actually have extraterrestrial DNA. But the Oklahoma teenager's almost otherworldly flexibility, grace and physicality on the NBC show "World of Dance" has earned her an unearthly nickname from celebrity judge Derek Hough. "After my first performance when Derek called me an alien, all my friends started calling me that, too.Read more on NewsOK.com