What group formed in 2010 by Starship Entertainment released their fourth extended play on June 21, 2016?
Sistar Sistar (, often stylized as SISTAR) was a South Korean girl group formed in 2010 by Starship Entertainment. The group consisted of Hyolyn, Bora, Soyou, and Dasom. Their debut studio album "So Cool" was released on 9 August 2011. Their second album, "Give It to Me," was released on 11 June 2013. Their biggest hits include "So Cool", "Alone", "Touch My Body", "Loving U" and "Give It to Me". Their fourth single, "So Cool," debuted at number one at "Billboard" Korea K-Pop Hot 100 singles chart.
Good Luck (AOA song) "Good Luck" is a song recorded by South Korean girl group AOA for their fourth extended play of the same name (2016). It was released as the title track from the EP by FNC Entertainment and distributed by LOEN Entertainment on May 16, 2016 in conjunction with the mini-album. The lyrics were written by Han Seong-ho, Jang Yeon-jeong and Innovators and the music was composed by Matthew Tishler, Aaron Benward and Felicia Barton. To promote the song and the EP, AOA performed "Good Luck" on several South Korean music programs, including "Music Bank", "Show! Music Core" and "Inkigayo". A music video for the title track was also released on May 16. The song was a commercial success peaking at number 2 on the "Gaon" Digital Chart. It has sold over 545,952 digital copies as of July 2016.