A live broadcast was held at the CJ E&M Ilsan Studio on December 19. Kim Il-joong served as host for the show. A nationwide voting was held to determine if Stray Kids would debut as a seven-member or a nine-member group. The seven-member version of 'Yayaya' and 'Young Wings' was performed first. Park gave positive remarks on the first two stages. Min-ho and Felix came out to join the group and performed the nine-member version of 'Hellevator', 'School Life' and a new upbeat song titled 'Grrr'. Jun. K of 2PM performed a special stage. The live vote ended with 96% in favour of the nine-member group. Park commented, 'A robot has no mistakes, but a robot and human are different. When I see a nine-member stage, I still see lacking parts in both of you. But when all nine performs, the expressions are alive. Congratulations, you will debut as nine'.
