Generally receiving positive reviews from critics upon its release, "Hybrid Theory" became a strong commercial success. Peaking at number two on the US "Billboard" 200, it is certified 12x Platinum by the Recording Industry Association of America (RIAA). It also reached the top 10 in 15 other countries and has sold 27 million copies worldwide, making it the best-selling debut album since Guns N' Roses' "Appetite for Destruction" (1987) and the best-selling rock album of the 21st century. At the 44th Grammy Awards, it won Best Hard Rock Performance for "Crawling".