TREASURE main vocalist Park Jeongwoo is going viral after delivering an unforgettable duet performance with BTOB leader Seo Eunkwang on “Greatest Moment.” The special challenge video, shared through BTOB COMPANY’s official socials, instantly caught fans’ attention for its raw live vocals and emotional delivery.

Seated under a simple spotlight, Jeongwoo and Eunkwang created a powerful atmosphere that allowed their voices to shine without distraction. “Greatest Moment,” a track from Eunkwang’s solo album UNFOLD, demands strong control and soaring high notes—and Jeongwoo proved he was more than ready for the challenge. His stable belts, smooth transitions, and confident ad-libs blended beautifully with Eunkwang’s rich and seasoned tone.

Fans quickly flooded social media with praise, calling Jeongwoo’s vocals “goosebump-inducing” and “main vocalist excellence.” Many were especially moved by how naturally he harmonized with Eunkwang, holding his own beside one of K-pop’s most respected vocalists. The performance reignited conversations about Jeongwoo’s potential for solo projects, with supporters urging YG Entertainment to highlight his vocal strengths even more.

Eunkwang also warmly praised Jeongwoo, describing him as kind, polite, cool, and passionately talented. The mutual respect between the two artists added an extra layer of emotion to the collaboration, making the duet even more meaningful for fans of both TREASURE and BTOB.

As the GreatestMoment_Challenge continues to feature different idols, this particular duet stands out as a true vocal showcase. With his powerful tone and growing confidence, Park Jeongwoo has once again proven why he is considered one of the strongest fourth-generation main vocalists.