couldn't agree more with ur point she's truly versatille it's like she could whatever she wants with her voice and yass!! the variety of her song, her discography can't lie you can check out her since her solo album debut "Love&Hate" till her recent album, even her old duet song like with jaypark, jooyoung and the others its really dope
If you have been into Kpop since the 2nd gen era you guys will know how talented Hyolyn has been since her debut lol and back on her sistar's era, for some reason korean public just call her korean's beyonce
Speaking of Sung Si-kyung, Hyolyn had actually become a duet partner for a song of Yang Da-il who is another amazing ballad singer. Letting you know just in case you wanna check it out!