Lee Seung Hyub (이승협), also known as J.Don, is a South Korean singer, rapper, composer, and actor under FNC Entertainment. He is best known for being the leader and vocalist of the band N.FLYING. He wrote and composed several tracks for their band, including their hit song "Rooftop".
He made his official debut in Japan with N.Flying back in October 2013. In 2015, he collaborated with AOA's Jimin for the song "God" in which he used his other stage name, J.Don. By May of the same year, he made his official domestic debut with N.FLYING. Besides performing on stage, Seunghyub has also starred in dramas such as "Save Me" and "Best Chicken".
Seunghyub made his official solo debut in 2021 with the single album "On the Track".