H-Logic is the fourth studio album by South Korean singer Lee Hyori.

[1] The album has 14 tracks, including collaborations with Daesung from Big Bang, Jiyoon from 4Minute, Bekah from After School, Gary from Leessang, and Sangchu from Mighty Mouth.

The singer worked also with E-Tribe, the team behind "U-Go-Girl", the lead single from her previous album.

Lee performed "Swing" in the music video as their first single with Gary of Leessang.

"Chitty Chitty Bang Bang" received a nomination for Best Dance Performance – Solo at the 2010 Mnet Asian Music Awards, but lost to Rain's "Love Song".