Rainbow unveiled their MV teaser for "To Me" a few days ago, and they recently released their�latest mini-album"SO?" , which sparked a high interest from K-Pop fans. The girls will perform their first official comeback stage through this week's episode of�"Music Bank", and many have been wondering about what kind of unique choreography will be presented. Some parts of the choreography were reportedly adapted from the international box office hit, "Black Swan"; the group will�incorporate�some of the ballet moves in their performance, which is quite a difficult task to accomplish. Stay tuned to allkpop for Rainbow's comeback performance on April 8th! Source: Star News