There is more than one artist with this name:
1) Park Yoo-jin (Korean: 박유진; born July 26, 1996), known professionally as The Deep (더딥) is a South Korean musician and singer. She was previously one half of the musical duo Morethan7. She debuted as a soloist on March 8, 2019 with the single Marionette. Beginning her music career with lofi and R&B songs, she recently began experimenting with dance and electronic music.
2) The Deep was a short-lived American rock and roll band formed in Philadelphia .
