After selling out their comeback mini-album presales, Block B has taken the stage on MBC's 'Music Core' with "Tell Them". Block B was formed after many years of Cho PD's preparations. Their debut mini-album was released just one month and a half after their debut single. Block B had the help of Korea's best hip-hop seniors prior to their debut. The team's leader Zico wrote and co-composed "Tell Them" which is an upbeat and exciting track that fits the summer season. Source: Daum Music