There are two artists working under the moniker of Lexy:
1) Lexy (렉시) is a Korean Hip-Hop and R&B rapper & singer under YG Entertainment. She debuted in 2003 at MBC's Music Camp with her album Lexury, which reportedly took 5 years to make. She is the first artist to debut as a solo female artist under YG Entertainment. Albums: [2003.10.06] Lexury
[2005.07.26] Lextacy
[2007.04.19] Rush
[2008.03.27] The Lexy

Read more about Lexy on Last.fm.