H-Logic

H-Logic is the fourth studio album by South Korean singer Lee Hyori. It was released on April 12, 2010. 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.

The album sold 31,756 copies in 2010, making it the 46th best-selling Korean album in 2010. The promotions ended after the outputs of the two singles "Bring It Back" and "How Did We Get". Following the album’s release, seven tracks from the album was revealed to be plagiarized by Bahnus Vacuum. After the controversy, Lee took a temporary hiatus until 2013.

Release
Lee’s comeback made their return with their fourth studio album, the titled album was called H-Logic which would be shortly released on April 12, 2010, the album’s showcase would be in it.

Singles
Lee performed "Swing" in the music video as their first single with Gary of Leessang. The music video for the second single "Chitty Chitty Bang Bang" was released on April 7, 2011.

Accolades
"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".

Plagiarism
Seven of the songs in the album, which were produced by Bahnus, were plagiarized.