The Mnet vote manipulation investigation is a 2019 South Korean entertainment scandal involving electoral fraud in several reality competition series produced and broadcast by the television channel Mnet. The incident primarily involves the Produce 101 series and Idol School, which were intended to create K-pop groups with members selected by audience vote.

Produce X 101 is a 2019 South Korean boy group survival reality show on Mnet and the fourth and final season of the Produce 101 franchise. The public, referred to as "national producers", "produces" a boy band by choosing 11 members among the 101 trainees from 47 different entertainment companies and independent trainees through online voting and live voting with multiple elimination rounds. The public will also choose the group's concept, debut song, and group name. The show aired from May 3 to July 19, 2019. Contestant Kim Yohan from Oui Entertainment obtained the most votes at the end, becoming the debut group center. The group from this show was named X1, but after extensive voting manipulation was proven, the group was disbanded on January 6, 2020.