She debuted on September 18th, 2008. Her official Facebook posted the below image and wrote, "September 18th! Today is the 8th anniversary of #IU~ Stay together with IU from now on as well ♥×∞ Happy IU's 8th Debut Anniversary! #IU #UAENA".
IU has had hits after hits after hits and is one of K-pop's most talented singers. Congratulations to IU and her fans UAENA on her 8ths anniversary!