Jang Hyun-seung (; born September 3, 1989) more commonly known as Hyunseung, is a South Korean idol singer and dancer. He is best known as the vocalist and dancer of the boy band Beast, under the label Cube Entertainment. With Beast, he has released singles and albums in both Korean and Japanese. Beast won the Artist of the Year (Daesang) award at the Melon Music Awards in 2011.