July. On 21 July, Sistar released their third mini album, Touch N Move along with its title track "Touch My Body". EP was commercially very successful, peaking at numbers two and eight on Gaon and Billboard's US World Albums charts, respectively. Another single "Naughty Hands" was released in late July. On 26 August, Sistar released their fourth mini album and second summer special album titled Sweet & Sour, shortly after the promotions of "Touch My Body". EP contained two new songs "I Swear" and "Hold on Tight" and four remixes for singles "Loving U", "Gone Not Around Any Longer", "Give It to Me" and "Touch My Body". In December, Sistar won the Best Female Group Award at the 2014 Mnet Asian Music Awards. On 22 June 2015, Sistar released its fifth mini-album, Shake It, along with its title track of the same name. It debuted at number three on Gaon, and two new singles, "Shake It" and "Don't Be Such a Baby" were released in late June. In August, Hyolyn was confirmed to join the second season of Unpretty Rapstar. On 1 August, Sistar performed in Los Angeles, California at 2015 KCON. On 14 August, they performed at The 70th Independence Day of the Republic of Korea, their home country. On 7 September, Hyolyn released a free single, "The Wall Destroyer" featuring one of Eluphant's member, Keebee. On 22 September, Soyou collaborated with singer Kwon Jeong Yeol of 10cm. Their single is titled "Lean on Me." 2016–2017: Insane Love, "Lonely" and disbandment On 21 June 2016, Sistar released their fourth extended play, Insane Love, and its lead single "I Like That". The single debuted at number 1 on the Gaon Digital Chart, continuing the group's string of summertime hit songs. "I Like That" also topped several K-pop music video charts in China, including QQ Music, iQIYI, and YinYueTai. For the song, Sistar was awarded Singer of the Year for June in the Digital Music Category at the 2016 Gaon Chart Music Awards. On 22 May 2017, Starship Entertainment announced that Sistar would disband following promotions for their final single, "Lonely", to be released on 31 May. All the members wrote personal letters of farewell to their fans, confirming their disbandment. The group performed their most successful summer hits—"Touch My Body", "Shake It", "Loving U", and "I Swear"—along with "Lonely" on four major music shows before their final performance on Inkigayo