During 2005-2010, Heo had three solo songs from SS501 albums: "Hajimete Miru Sora Datta" from Kokoro,[1] "Is It Love?"

[6] Heo Young-saeng's solo debut mini album, Let It Go, was released on May 12, 2011 and features "Park Joo Hyun", the main rapper of girl group Spica, on the music video, and Kim Kyu Jong and Hyuna on "Rainy Love" and "Let It Go" tracks respectively.

[10] In 2012, Heo released his second mini-album entitled Solo in May,[11] participating in the album's planning and production.

[15] In 2013, Heo collaborated with Lee Jung Bong on a duet named "Goodbye My Love".

The following is an incomplete list of Heo Young-saeng's concerts, major fan meetings, and tours.