Hybrid Theory is the debut studio album by the American band Linkin Park, released in 2000. The record combines nu metal and rock with rap, electronics and the dual vocals of Chester Bennington and Mike Shinoda. Well-known songs are "One Step Closer", "Crawling", "In the End" and "Papercut", with lyrics about inner struggle, anger and alienation. The album became one of the best-selling debut records in its genre.