Reboot (Wonder Girls album)

On June 24, 2015, it was reported that member Sunmi would return to the group after her departure in February 2010. On July 20, it was confirmed that members Sohee and Sunye had officially withdrawn from the group. The same day, JYP Entertainment announced the return of the Wonder Girls with a new band concept. For this concept, Sunmi plays bass guitar, Yubin plays drums, Hyelim plays guitar, and Yeeun plays piano. Individual teasers of the members playing their respective instruments began being released on July 20.[3] Despite the concept, none of the members actually recorded instrumentals for the album, though they learned to play the instruments and performed songs with their instruments live.[4][5] Only Yeeun already knew how to play her instrument, the piano, prior to the lead up to the comeback. Both the main single "I Feel You" and its music video are heavily inspired by 1980s music, similar to the group's 2008 single "So Hot".

On July 29, a promotional video for the release of Reboot was released on YouTube. "I Feel You" served as the lead single for the album, being released on August 2. It was accompanied by a music video directed by Lumpens, which premiered on the same day on JYP Entertainment's YouTube channel. It takes place in 1987 and shows each member playing her own instrument and also solo scenes. It is their first single since Sunye's and Sohee's departures and their first single since 2008's "Nobody" to feature Sunmi. The song was promoted on major South Korean music shows, starting on August 8 on KBS's Music Bank; on those shows, they also performed other tracks from the album, including "Candle", "Back", and "Rewind". They also appeared on variety shows, including MBC every1's Weekly Idol. In addition, the group appeared on various radio shows.
The songs "Candle" (featuring Paloalto) and "Rewind" had dance practice videos released on YouTube on August 11 and 20, respectively.

Reboot debuted at number five on the Gaon Album Chart.[6] In the United States, the album debuted at number 2 on the Billboard US World Albums chart, becoming their best charting album on that chart. It also peaked at number twenty-five on US Heatseekers Albums.[7] It was ranked at number eighteen on FuseTV's list The 20 Best Albums of 2015 and at number one on Billboard's The 10 Best K-Pop Albums of 2015.

The main single, "I Feel You", charted at number one on eight major South Korean music streaming charts during the week of its release. It peaked on the third position of the country's Gaon Digital Chart.

• "I Feel You" music video on YouTube