A decade of music, memories, and milestones — SEVENTEEN marked their 10th debut anniversary with a surprise performance that electrified fans across the globe.

On Sunday, 25 May, the 13-member K-pop powerhouse lit up Jamsu Bridge in Seoul, South Korea, for their special “10th Anniversary B-Day Party: BURST Stage.” The iconic venue served as the perfect backdrop for the group’s milestone event, transforming into a celebration of artistry and gratitude for the group’s loyal fanbase, Carats.

The highlight of the night? A surprise live performance of “Thunder,” the title track from their highly anticipated fifth full album, Happy Burstday. The high-energy track, performed under the Seoul skyline, was met with explosive cheers both from the lucky on-site audience and fans watching around the world.

The group — known for their self-produced music, synchronized choreography, and unshakable brotherhood — has come a long way since their debut in 2015. From humble beginnings to international tours and chart-topping albums, SEVENTEEN has become one of the defining acts of K-pop’s third generation.

Set for release on Monday, 26 May, Happy Burstday coincides with SEVENTEEN’s exact debut date and stands as both a gift to fans and a testament to their evolving sound. With “Thunder” leading the charge, the album is expected to carry messages of celebration, reflection, and a renewed burst of creativity.

The bridge performance was more than a concert — it was a declaration. A reminder that SEVENTEEN, after ten incredible years, still has the power to surprise, innovate, and connect.