f(x) (에프엑스; pronounced "Effects") is a four-member Korean pop girl group created by SM Entertainment in 2009. The group has been given the title of "Asia Pop Dance Group" by their label and are touted as a multinational group since f(x) consists of members from China, the United States, and South Korea.
- Victoria (빅토리아) - leader, vocals, main dancer
- Amber (엠버) - main rapper, sub vocals
- Luna (루나) - main vocals, lead dancer
- Krystal (크리스탈) - lead vocals, visual, maknae
- Sulli (설리) - Vocals, Lead Rapper, Visual
- "Chu" (2009)
- "Invincible Lee Pyung Kang OST Part 3" (2009)
- "Master of Study OST Part 2" (2010)
- "More Charming By The Day OST Part.1" (2010)
- "Juloring Animal Detectives OST"
- "Paradise Ranch OST Part.1" (2011)
- "Puzzle Bubble Online OST" (2011)
- "Hot Summer" (2012)