Lee Jin-sung (Korean: 이진성, born February 27, 1985),[1] better known by the stage name Monday Kiz (Korean: 먼데이 키즈), is a South Korean singer and former member of Monday Kiz.

He released his first album as a solo artist on May 3, 2016.

[2] Originally a duo of Lee Jin-sung and Kim Min-su, it was disbanded on August 4, 2008 when Kim Min-soo died in a motorcycle accident on April 29, 2008.

It was re-engaged as a trio in April 2010.

This article about a Korean singer is a stub.