Lee Chang Sub (이창섭; or Changsub) is a South Korean singer under Cube Entertainment. He is a member of the boy group BTOB and its sub-unit BTOB-BLUE.
He made his solo debut on December 11, 2018 with the mini album Mark.
- Mark (2018)
- "Piece of BTOB Vol.1" (2017)
- "2012 Road For Hope Part.1" (with Yang Yo Seop, Heo Ga Yoon, G.NA) (2012)
- "After the Play Ends" (with Elkie) (2016)
- "A Poem A Day OST Part 5" (2018)
- "Bpm82.5" (2017)
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