Derek Hough on Instagram: "How do you honor 20 years of Dancing with the Stars? For me, the answer was simple: you start with the one constant melody that’s been there since day one. We’re reimagining that iconic theme in new styles to celebrate two decades of magic. So here’s a little behind-the-scenes: before any choreography, it all starts with that track. And of course, sending a bunch of wild ideas to @raychewlive and making it all happen! Legend Here’s to 20 years of dancing and many more.