Singer Son Tae-jin delivered a powerful performance on KBS2's year-end special of 'Immortal Songs,' showcasing his vocal abilities that transcend genres. On December 27, Son Tae-jin appeared in the second part of the '2025 Year-End Special - Trot Kingdom, Game of Thrones,' captivating viewers with his deep song selection and outstanding singing skills. This broadcast followed the first part aired on the 20th, featuring an intense battle for the throne between the New Trot team led by Son Tae-jin and the traditional trot team led by Lee Chan-won.

In the third-round performance battle, Son Tae-jin chose Han Young-ae's "Is Anyone There?" He dominated the stage with relaxed charisma and a stylish performance. The combination of controlled breathing, deep vocal tone, and delicate facial expressions created a stage reminiscent of a musical. These elements further enhanced the viewers' immersion.

In the fourth-round hidden card battle, "Final Strike," he collaborated with Liberante to perform Patti Kim's "You Are My Friend." The three artists blended classical tones over a crossover arrangement, breaking down genre boundaries. Especially, the sophisticated harmony building toward the climax brought tears from many in the audience, while the opposing team watched the stage in awe. It was a moment that personally proved the essence of crossover.

After a close contest, Son Tae-jin advanced to the final round and selected Seol Woon-do's "Last Love." He intricately portrayed a poignant emotional line, capturing the hearts of the audience. His restrained vocals conveyed a deep resonance that moved the audience's emotions. Regardless of the outcome, the two teams' performances, proving themselves through music itself, delivered profound emotion fitting for the year-end special.

Son Tae-jin demonstrated his presence as an all-around artist expanding the landscape of 'Trot Kingdom' by showcasing performance, vocal skills, and teamwork in collaborative stages. In the finale, he raised the atmosphere to its peak by passionately singing "Amor Fati" with the mysterious "Princess" Kim Yeon-ja. Son Tae-jin naturally led the audience's chorus and applause with his unique relaxed stage manner. The year-end special concluded with a stage where excitement and emotion coexisted.

After the broadcast, viewers praised Son Tae-jin, saying, "A stage you can trust from song selection to singing," and "A performance that conveyed emotions through music beyond trot." Encouraged by these responses, Son Tae-jin will hold the nationwide tour '2025 Son Tae-jin Nationwide Tour Concert "It's Son Time"' on January 17 and 18, 2026, in Yongin, where he will meet fans from all over the country.