|Presented by||Tak Jae-hoon|
|Country of origin||South Korea|
|Production location(s)||South Korea|
|Original release||April 22, 2007 – September 14, 2008|
November 30, 2008 –
March 22, 2009
|Followed by||Immortal Songs 2 (2011–present)|
The first season of Immortal Songs was co-hosted by former Country Kko Kko partners Shin Jung-hwan and Tak Jae-hoon. Although the show initially had various co-hosts, Kim Sung-eun became the final permanent host alongside Shin and Tak. The special guest for the week is their "vocal coach," usually a famous Korean singer, although sometimes record producers and composers have appeared as the special guest. During the course of the show, the special guest's top singles (as voted by netizens) are revealed and the "students" must sing karaoke-style. At the end of the show, the best singer/student is chosen by the special guest and receives a special prize. This segment started from Kim Won-joon's episode where he brought in presents on his own accord. The show has typically showcased older singers from the past who may or may not be still active in the entertainment industry, including Lee Seung-chul and Kim Heung-gook. However they have also had episodes featuring more recent artists, including S.E.S., in recognition of their 10th anniversary since debut, as well as Sung Si-kyung just before he left for military service in July 2008. This show aired its final episode on September 14, 2008 and was replaced by Kko Kko Tours Single♥Single.
Happy Sunday brought back Immortal Songs with the same hosts, Shin Jung-hwan, Tak Jae-hoon and Kim Sung-eun. Its first returning episode began airing November 30, 2008, replacing Kko Kko Tours Single♥Single. Kicking off the second season, Patti Kim was the special guest. Patti Kim was the first Korean artist to be invited and perform on Japan's NHK network as well as The Johnny Carson Show in Las Vegas, United States. In season 1, Patti Kim was one of the guests that they wanted to invite on the show but was unable to. This segment was cancelled in late March 2009 and has since been replaced with Qualifications of Men.
- Ko, Seung-hee (March 23, 2007). "'불후의 명곡' 탁재훈-신정환, '선을 넘지 마라'". Sports Chosun. Archived from the original on May 26, 2015. Retrieved April 30, 2015.
- (in Korean) KBS '불후의 명곡', '꼬꼬관광' 이어 연말 깜짝 부활 My Daily. November 19, 2008. Retrieved November 23, 2008.
- "Patti Kim Marks 50th Anniversary of Singing Career". The Chosun Ilbo. March 25, 2008. Retrieved November 23, 2008.