Question: Gwiyomi was popularized on a South Korean variety show that airs on which day of the week?
Sentence (from "Gwiyomi"): The gesture is called 'Gwiyomi Player', that was popularized by South Korean variety show "Weekly Idol" through a segment called "The Aegyo Battle" (Battle of Cuteness) following Ilhoon's guest appearance on the show in October 2012.
Relevant evidence: Yes