The song, the title track of the group's fourth full-length album of the same name, nabbed the top spot in seven South Korean music sites - Melon, Olle Music, Genie, Bugs, Naver Music, Soribada and Monkey 3 - as of 8 a.m. Tuesday, outpacing K-pop singer and actress IU's "Twenty-three," the title track of her new mini album "CHAT-SHIRE."
"4 Walls" also ranked No. 1 in the King chart of Baidu, China’s largest web portal. All of the other songs in the album were included in the chart's top 20.