Roo'ra ("Rulla") is Korean hip hop and dance group from 1994–2001. Its name is abbreviation of Roots of Reggae. Many of the group's albums were the top selling of their time in Korea, with their debut album selling over 280,000 copies. They hold the record of first artist to sell one million albums in the dance and hip-hop genre in Korea. The group also caused significant controversy in 1996 through the discovery of their unattributed sampling of a Japanese track ("Omatsuri Ninja", お祭り忍者 by Ninja) directly in their own song "Cheon sang yu ae" (天上有愛 "천상유애").