What makes Let It Go by Heo Young-saeng notable?

'Let It Go' debuted at number one on the Gaon Album Chart, reflecting Heo Young-saeng's strong fanbase and commercial appeal. The title track resonated widely, contributing to the ongoing popularity of K-pop both domestically and internationally during this era. Released on May 12, 2011, 'Let It Go' was Heo Young-saeng's first EP following his departure from the boy band SS501. This project marked a significant step in his solo career as he sought to establish his identity as an individual artist after achieving fame with the group.