SEE ALSO: Seo In Guk wears a traditional dress for his year-end concert

He surprised 5,000 fans with his various charms at his first solo concert, 'Supr-In-Guk', held at Ewha Women's University on December 28-29. Seo In Guk opened the concert with "Saranghae U" and went on to sing "Time Machine", "All I Want Is U", Sa Joon's "Memories", miS=mR's "It's For You", and Delispice's "The Confession". He also replied to fans' requests by singing his duet song with A Pink's Eunji, who wasn't able to make it to the concert, "All For You", while showing a video of his love story on 'Reply 1997'.

Lyn also appeared as a special guest and performed "Honey Baby Love" and "Back In Time". Seo In Guk then lightened up the atmosphere with his parodies of Akdong Musician's Lee Soo Hyun and traditional folk musician Song So Hee.

Seo In Guk then surprised fans with his sexy stages of Michael Buble's "Feeling Good" as well as his songs "Bad" and "Broken". Actor Lee Sung Jae and singer Zia also came out to show their support. Seo In Guk and Zia performed their duet song "Breaking Up Man and Woman", and Zia went on to perform her latest single, "To Be Expected".

He also performed, "Take", "Shake It Up", and "My Baby U" as well as a parody of Crayon Pop and got jumping with fans in his helmet and skirt. He concluded the concert with his 'The Sun of My Master' OST, "No Matter What".

Seo In Guk gave his New Year's greetings: "This is the end. I feel like I should apologize for saying this, but there's something amazing I learned from a drama role. 'There needs to be an end to have a beginning.' It was really nice to spend the end of 2013 with you all. Thank you, everyone. I was able to stand on stage because of you, and my wish was granted... I'm always touched by you. You know I really love you, right? Although it's the end, I will greet you again with a better image next year. I promise. It snowed a lot, so please be careful. I'll see you all again."

Check out the photos from the concert as well as a special photo Seo In Guk promised to share during the event below!