The singer revealed her latest song and its music video through Mnet website and portal site Naver yesterday, prior to the record's official release on April 8.
"Swing", which is composed of acoustic guitar melodies, features Gary of popular Korean hip-hop duo Leessang.
She had posted a message on her fan cafe last month, explaining that the new album is "full of the kind of music that I really like and wanted to make."
Lee, 30, debuted in 1998 as a member of popular girl band Fin.K.L. and went solo after the group disbanded in 2002. She has released three studio albums as a solo artist, producing several hits including "10 Minutes", "Hey Girl", "Get Ya" and "U-Go-Girl".
She has also branched out to acting, hosting and appearing on variety shows, most notably on the first season of SBS' "Family Outing".
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