Rainbow Attempt to Turn 'Black Swan' Into a Sultry Disco Track — billboard.com

After nearly two years away from the K-pop scene, Rainbow returned with an unexpectedly dark and sultry concept for new single "Black Swan" with lyrics and a concept based loosely around the film starring Natalie Portman. The track opens with lonesome synths and a subtle shuffle beat as the girls sing about witnessing a change within themselves. Translated lyrics like, "The reflection in the foggy mirror is not me / Who is it?" and "Trapped inside the red eyes / Dazzling and free" best encapsulate the film before the song ends with member Woori whispering, "It's perfect" -- nearly the exact line with which Portman ended her Oscar-winning performance.

Read More