Though her debut album was well received, her second album Lextacy (released on August 26, 2005) didn't achieve as much commercial success when it was released and due to the poor sales it prompted a decision by YG Entertainment to not renew her contract.

On September 12, 2007, when Yang Hyun Suk announced that Lexy left YG Entertainment, as signing with the agency did not happen, he also revealed that because of that, he felt like he was giving away his younger sister for marriage.

After transferring to SB&W Entertainment (joint venture of Sony BMG (now Sony Music) & now-defunct SK Telecom subsidiary WiderThan), Lexy released a new album, THE LEXY, featuring few hip hop artists such as Crown J and VOS.

The album consisted of different music style by Lexy going more on the electronic hip hop genre, plus ballads and jazz and was released on March 24, 2008.

In February 2012, Lexy blogged about her return to the music industry and her scheduled 6th album release in August.