Retrieved 6 July 2017. ↑ "Male trainees auditioning for 'Produce 101' have their very first special stage on 'M Countdown'". Retrieved 1 April 2017. ↑ "'Produce 101' Season 2 Contestants Shines on Their Very First Performance [WATCH]". koreaportal.com. Retrieved 2 June 2017. ↑ "Introducing 51 Of The "Produce 101" Season 2 Participants".