Electric Shock (EP)
"Electric Shock" is the second studio extended play (EP) by South Korean girl group f(x). The EP was released digitally on June 10, 2012, and released physically on June 13, 2012, under S.M. Entertainment. The EP's title track, "Electric Shock", as well as the EP, reached at the top spot on the weekly Gaon Charts. The EP sold a total of more than 70,000 copies in South Korea.
The EP's single and title track, "Electric Shock", is an electronic-dance song. The lyrics starting each line with the word, "jeongichunggyeok" ("electric shock" in English). It was written and arranged by Willem Laseroms, Maarten Ten Hove and Joachim Vermeulen Windsant, and produced by Future Presidents. The music video was released on June 11, 2012, and was choreographed by Jillian Meyers.
The track "Jet" is composed by SM Entertainment's songwriter Kenzie, the track has hip-hop rhythms and electronic dance; Amber co-wrote the rap.
The track "Zig Zag" was especially produced to focus on the "youthful and refreshing blend of vocals" of f(x) members which adds to the urban electronic sound created by the use of electric guitars and drum beats. The track was composed and written by music producer Hitchhiker. The lyrics were penned by Kim Bumin who often works closely with Hitchhiker.