These are occasions in which a rapper’s lyrics crossed the line or evoked a public outcry. Photo Credit: Paul Natkin/Getty Images We look back on 15 controversial rap lyrics over the last 35 years. The song, which includes lyrics about looting Korean-owned stores, was vehemently opposed by members of the Korean-American community. Ice Cube's 'Black Korea' is one of the most contersersal rap songs ever.