After announcing on his Twitter that he would soon be sharing a rehearsal video, singer Jay Park was true to his word by releasing his dance rehearsal footage for "Up & Down" and "Star". In the video, Jay freely displays his refined dance moves and his interactive choreography steps. After watching the clip, his ecstatic fans responded with, "FINALLY!", "So hot!", "Ahh!! Up&Down!", "Love watching this already!", and more. Check it out below! Source & Image: Jay Park's Twitter