"Up & Down" (Korean: 위아래; RR: Wiarae) is a song recorded by South Korean girl group EXID. It was released on August 27, 2014 by Yedang Company as a digital single, serving as the lead single for the group's second extended play Ah Yeah, which was released on April 13, 2015. Initially failing to chart, the song eventually became a commercial success in South Korea, peaking at number one on the Gaon Digital Chart 4 months after its initial release, and went on to sell more than 1.4 million digital units by the end of 2015.