Lee Seung Gi recently made his comeback as a singer for the first time in five years, releasing his seventh studio album “The Project” on December 10. After he appeared on the show singing “I Will,” he said, “The last time I appeared as a singer and not as an MC or an actor was before I went to the military. It was five years ago. I enlisted in 2016, so my last album must have come out in 2015. I am always nervous before a performance, but I feel way more pressure on ‘Yoo Hee Yeol’s Sketchbook.’ This is the one place that the audience is lit up for the performer.”