Lee Su-yeon demonstrated powerful skills in the first round of the semifinals on MBN's 'Active King 3,' taking a step toward advancing to the finals. In the episode aired on January 17, Lee Su-yeon chose So Yu-mi as her opponent. She selected Lee Tae-ho's "Gandae-yo Geulsse" to perform on stage.

Before going on stage, Lee Su-yeon stated, "If I get through this round, I will advance to the finals. Many people like my high notes, so I included a double modulation in this song. I will show you my unique ultra-high notes." From the first verse, she overwhelmed the atmosphere with explosive vocal power and heartfelt emotional expression, capturing the attention of both the audience and the judges.

Especially, the ultra-high note section performed by Lee Su-yeon reached the peak of the stage, giving chills to everyone. Right after the performance, she received sharp advice from legendary judges such as Seol Woon-do and Seo Joo-kyung. However, she earned balanced support from both the celebrity evaluation panel and the live audience panel, scoring 193 points and ranking second in the interim standings, securing a favorable position for direct advancement to the finals.

Lee Su-yeon's outstanding performance left a deep impression on both the audience and the judges. Through this competition, she solidified her unique musical color and showed strong determination to advance to the finals. Expectations for Lee Su-yeon's next stage are rising.