The group consists of eight members: Baby Soul, Jiae, Jisoo, Mijoo, Kei, Jin, Sujeong, and Yein.

[2] The group's debut studio album Girls' Invasion was officially released on November 17, along with its lead single titled "Candy Jelly Love".

[6] On April 17, Lovelyz extansion their promotion with another song from their repackaged album, "Amusement Park", on music programs.

[13] On October 31, Lovelyz was a guest on You Hee-yeol's Sketchbook where they performed an a cappella cover of Michael Jackson's song "Beat It".

[14][15][16] "Ah-Choo" had maintained its position on most major Korean music charts throughout 2015 and early-2016, making it Lovelyz's biggest hit.

[19] On December 7, Lovelyz released a three-track single album titled Lovelinus, named after their official fan club.

[20] In January 2016, It was announced that the group's first reality show Lovelyz in Wonderland would begin airing February 2 on SBS MTV for eight episodes.

[21] Their song "Ah-Choo" continued to remain in digital Korean music charts, long after its release on September 14, 2015.

[24] "Destiny" also received attention from American producer Brent Fischer who praised the lead single for its "world-class grooves and current arrangements".

[27] However, in the early morning hours of February 27, the song was removed from Melon's real-time chart due to a technical glitch.

[29] Few weeks later, on March 23, Yein re-joined the promotions by performing at music program M Countdown for first time since recovering from the injury.

[35] The group promoted the song on various South Korean music programs, and received their first win for "Twinkle" on November 28 on The Show.

[42] Lovelyz held their comeback showcase at Blue Square iMarket Hall on the same day as the album's release, and was broadcast live through the Naver app V-Live.

[45] Lovelyz performed "Wag-Zak" for the first time at Mnet's M Countdown on June 28,[46] followed by promoting in the various music programs for a week.

[56][57] Later, Baby Soul confirmed that although the members are signed under different agencies, they still have desire to promote and release albums together as Lovelyz in the near future.

[58] After leaving Woollim Entertainment in November 2021, the group went on hiatus to focus on individual activities with each of the members under different management.

[66] In August 2016, members of Lovelyz were appointed by the Ministry of National Defense to become anti-smoking ambassadors for the South Korean military.