Red Light is the third studio album by South Korean girl group f(x), released on July 7, 2014, by SM Entertainment and Genie Music. It reached number one on the Gaon Album Chart and had two promotional singles, "Red Light" and "Milk". This is the last album with Sulli, who left the group one year after its release.

Pink Tape is the second studio album by South Korean girl group f(x). The album was released on July 29, 2013, by SM Entertainment. Pink Tape is the first studio album by f(x) in over two years, the last being the repackage of their first album Hot Summer in 2011, and their first Korean release in over a year since 2012's Electric Shock. The album peaked at the number-one position on multiple music charts internationally, including Billboard's World Albums and South Korea's Gaon charts.