STAYC’s Sieun delivered a heartfelt and powerful performance alongside her father, legendary singer Park Nam-jung, showcasing their unmistakable family chemistry.

Sieun appeared on the December 13 broadcast of KBS2’s Immortal Songs, taking part in the special year-end episode titled 2025 Family Vocal Battle.

Sharing the stage with her father on Immortal Songs for the first time, Sieun reflected on the meaningful moment, saying, “Even after debuting, I often imagined what it would be like to perform on stage with my dad. The opportunity came sooner than I expected. I was surprised, but I approached it with deep gratitude.”

Park Nam-jung also shared his thoughts, revealing, “I learned so much while practicing. I’ve mostly performed solo, but preparing music and choreography that fit current trends pushed me to practice even harder.” Anticipation grew for the special stage bringing together two artists from different generations.

Throughout rehearsals, Sieun demonstrated a highly professional attitude. She personally checked her father’s stage positioning and guided his movements, later commenting, “My dad never gives up. Once something is mentioned, he practices it relentlessly, almost like a perfectionist.” Her admiration was evident.

Ahead of the performance, Park Nam-jung praised his daughter, saying, “She has exceptional talent. There’s nothing for me to teach her — only things for me to learn.” Sieun responded warmly, adding, “If I didn’t inherit this from my dad, I honestly wonder where it came from. It really made me understand what people mean when they say talent runs in the blood.”

On stage, the duo performed 3D and Park Nam-jung’s classic Days Brushed by the Rain. Their commanding presence and seamless performance completely captivated the audience. Park Nam-jung’s seasoned artistry combined with Sieun’s fiery passion created explosive synergy, drawing admiration from all in attendance.

Meanwhile, STAYC recently wrapped up its second world tour, STAY TUNED, visiting eight cities across Asia, four cities in Oceania, and ten cities in North America. The group is also preparing for the release of its first full-length Japanese album, STAY ALIVE, scheduled for February 11 next year.