On March 20, 2026, Kim Sung Kyu dropped a fresh Instagram update that’s already going viral. He joined the '#널떠올리면' ('When I Think of You') vocal challenge, revealing a side fans rarely see — and he teamed up with SG Wannabe’s Kim Yong Jun for the duet.
Wearing a black suit and locking eyes with the camera, he showcased a silky tone and powerful projection. The post included hashtags like '#SGWannabe', '#KimYongJun', and '#KimSungKyu', drawing a massive response from fans.
Comments poured in: "Wow, that was insanely clean," "the ultimate angelic tone power," and "his power and tone are crazy." Others praised, "He doesn’t even need a mic — huge vocals and rich emotion. So, so good."