Kassy 케이시, Kim So-yeon is a South Korean female singer. Kassy debuted in 2015 and competed on the survival reality show Unpretty Rapstar 3 in 2016. She has since released the extended plays, I Want Love and Rewind


  • Stage Name: Kassy (케이시)
  • Birth Name: Kim So Yeon (김소연)
  • Birthday: October 6, 1995
  • Birthplace: Seoul, South Korea
  • Zodiac Sign: Libra
  • Height: 170 cm (5’7″)
  • Albums: Cho young soo All star - Kassy, Basick, The Bride of Habaek 2017 (Original Tv Soundtrack), I want love
  • Genres: K-pop, Contemporary R&B


Twitter: @official_kassy
Instagram: @real_kassy


– Kassy was born in Cheongju, South Korea.
– She has a good English pronunciation.
– From her performance of “I’m Not Laughing”, alongside Euna Kim, Grace, and Janey, she was complimented by Leessang’s Gil because of her rapping tone.
– During Unpretty Rapstar 3, Mnet edited her to be the ‘non-rapper dressing, terrible’ one. This leaded her to be the first one eliminated in a deathmatch with Grace.
– She could’ve won the deathmatch, if she didn’t lack self-confidence and her posture being awkward in most of the performances.
– She tends to be very quiet.
– Her singing and rapping voice are so different from each other, they could be mistaken for two other people.
– Some people say that Momoland’s Daisy looks a lot like her.
– She has collaborated with fellow contestant, Giant Pink, for the song “I Don’t Think I Love You”.
– She has a SoundCloud, where she posts lots of covers, and different versions of her songs.


2015.04.06 Cherry blossoms and chestnuts (Song with PK Heman under the name of Dorothy. Before debuting under the name Casey)
2015.08.25 In My Bed
2015.11.30 Woo Woo ( Feat.Irfant )
My Hero (with Suho , Lee Teuk ) 
2017.01.26 Dream
2018.06.11 Oily Melo OST Part.5 When Love Begins
2018.08.29 Let's Eat 3 Memory OST Part.7
2018.09.18 Hold Your Hand OST Part.1
2018.12.31 It was nice
2019.03.28 True Song 
2019.09.05 Rewind 


    Plover-I like your tone
    Tuvik -Star Night
    Tuvik -I miss you
    Tuvik -Close to you
    Sanchez -Get closer
    Yoonyo-B & W
    Woo Jin Young -Which Star Are You From?
    Giant Pink -I don't love you
    Bio -Close your eyes 

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