Sung Si-kyung recently attracted attention for his changed appearance in a video released through the official account of KBS 2TV's "The Seasons - Sung Si-kyung's Ear Boyfriend." In the video, he parodied the "stair shot" popular among idols on "Music Bank," showing a different side by squeezing his body against the stair railing and making exaggerated facial expressions. The video included the caption, "When you realize you not only have to be an MC but also dance and act weird," humorously expressing his experience as a music program MC.

After being selected as a model for a beauty brand, Sung Si-kyung lost 10 kg in about two months, presenting a sharper impression and a lighter silhouette. Various photos were also released, showing him striking relaxed poses on the stairs wearing a black turtleneck and slacks or brushing his hair back with a puzzled expression. These changes prompted reactions such as "He looks younger" in the comments.

Sung Si-kyung debuted in the music industry by winning the grand prize at the 1st "Tteuak Festival" in 2000 and officially began his activities with the release of his first full-length album, "Like the First Time," in 2001. Since then, he has established himself as an emotional ballad singer with several hit songs including "On the Street," "Every Moment of You," and "Hee-jae." Recently, he has expanded his activities into various fields such as variety shows and YouTube, and since last month, he has been meeting viewers as the MC of "The Seasons - Sung Si-kyung's Ear Boyfriend."