El7z Up

El7z Up (stylized in all caps or formally as EL7Z U+P ) is a South Korean female supergroup project formed through the Mnet reality competition show Queendom Puzzle. The group is managed by Apple Monster and DG Entertainment, and consists of seven members: Kei from Lovelyz, Yeeun from CLC, Yeoreum from WJSN, Yeonhee from Rocket Punch, Nana from Wooah, Hwiseo from H1-Key, and Yuki from Purple Kiss. They debuted on September 14, 2023, with the extended play (EP) 7+Up.

Name
The group's name, El7z Up, is the word "Puzzle" spelled backwards, with the number "7" representing the number of members in the group and replacing one of the "z". The name represents "the best seven members the audience 'puzzled' out".

Pre-debut: Background and formation through Queendom Puzzle
All members of El7z Up have previously made their debuts in other girl groups. Kei debuted as a member of Lovelyz in 2014, Yeeun debuted as a member of CLC in 2015, both of whom also debuted as soloists in 2019 and 2023 respectively. Yeoreum debuted as a member of WJSN in 2016 and as a member of WJSN's first subunit WJSN Chocome in 2020. Yeonhee debuted as a member of Rocket Punch in 2019. Nana and Yuki debuted as a member of Wooah and Purple Kiss respectively in 2020. Hwiseo debuted as a member of H1-Key in 2022.

El7z Up was formed through the reality competition show Queendom Puzzle, which aired from June 13 to August 15, 2023. The show brought together twenty-eight active female idols to form a supergroup consisting of seven members. On July 25, during the seventh episode, the name of the group was revealed. During the finale, the final seven members of the group were announced, along with the aim of a September debut later that year.

Before appearing on the show, Kei participated in the first season of the show's legacy series Queendom as part of her group Lovelyz. Yeoreum also participated in the second season as part of her group WJSN, where they finished in first place.

2023–present: Debut with 7+Up, and 2023 MAMA Awards
On September 14, 2023, El7z Up made their debut with the release of the EP 7+Up, along with its lead single "Cheeky". The group held their first concert in Japan titled "Piece Up", taking place in Saitama at Omiya Sonic City on October 22, in Osaka at Grand Cube Osaka on October 24, and in Tokyo at Tachikawa Stage Garden on November 26. On November 29, El7z Up appeared and performed at the 2023 MAMA Awards.

Members

 * Kei (케이) – from Lovelyz
 * Yeeun (예은) – from CLC
 * Yeoreum (여름) – leader; from WJSN
 * Yeonhee (연희) – from Rocket Punch
 * Nana (나나) – from Woo!ah!
 * Hwiseo (휘서) – from H1-Key
 * Yuki (유키) – from Purple Kiss