From August 29th, 2019 to October 31st, 2019, the TV program Queen Dom was aired. Queen Dom is the comeback battle between K-pop girl groups. The cast included MAMAMOO, Park Bom, OhMyGirl, (G)i-dle, Lovelyz, and AOA. The winner of the program was awarded a comeback show. Each group prepared for the contests and the winner received benefits. They prepared hard for each stage. Also, they didn't participate in the contests to beat other groups; they simply tried their best to win their own group. The contest and each group's mood was good.

There are four contests in Queen Dom. The first contest is the "heat" song contest. MAMAMOO performed Decalcomania. Park Bom performed You and I. Also, OhMyGirl sang Secret Garden. (G)i-dle choose LATATA. Lovelyz performed Ah-Choo. Finally, AOA performed Short Skirt. In the first contest, the winner was (G)i-dle. They received 9,858 points.

In the second contest, they covered opposing teams' songs. MAMAMOO covered AOA's song Good Luck. AOA covered MAMAMOO's song Egotistic. Park Bom covered (G)i-dle's Han. Also, (G)i-dle covered Park Bom's song Fire. OhMyGirl covered Lovelyz's song Destiny. Finally, Lovelyz covered Brown Eyed Gils's Six Sense. Lovelyz changed the song through the mini-game. In the second contest, the winner was OhMyGirl.

In the third contest, they did a unit mission. The vocal units were OhMyGirl Hyojeong & ParkBom, AOA Hyejeong & (G)i-dle Minni and MAMAMOO Hwasa & Lovelyz Kei, Hyojeong and ParkBom sang Scarecrow. Hyejeong & Minni sang Instagram. Also, Hwasa & Kei performed Wish You Were Gay. The dance unit consisted of JeongYein, Sujin, Chanmi, Yua, and Moonbyul. Among the vocal units, the winners were Hwasa and Kei. Also, for the performance unit, Yua won the contest.

In the final contest, they each performed their comeback songs. AOA performed Sorry. This stage's concept was "cowboy". Lovelyz performed Moonlight. They tried a new concept. Park Bom sang There's No Turning Back. She sang to her self in a mirror. OhMyGirl performed Guerilla. Also, (G)i-dle performed Lion. The leader SoYeon produced the song. She was inspired by the movie Lion King. The last stage was MAMAMOO. They sang We Were Meant To See Each Other Again.

The winner was MAMAMOO. They had a comeback show and a fan meeting. They had their comeback on November 21st, 2019. Their title song's name is HIP. The second place was OhMyGirl.