"Tough Cookie" is the debut digital single by Zico. It was released on November 7, 2014 and features Don Mills. References Video links Music video MV teaser This article is a stub. You can help Kpop Wiki by expanding it. Retrieved from "https://kpop.fandom.com/wiki/Tough_Cookie?oldid=161510" Categories: Single article stubs Singles Digital singles Zico 2014 releases 2014 digital singles Community content is available under CC-BY-SA unless otherwise noted.