Linkin Park Hybrid Theory T Shirt Official Band Merchandise 100% Cotton Short Sleeve, Crew Neck T Shirt Hybrid Theory is the debut studio album by American rock band Linkin Park, released on October 24, 2000 through Warner Bros. Records. As of 2017, the album has been certified diamond by the RIAA for sales in the United States of over eleven million units, and peaking at number two on the US Billboard 200. It has reached high positions on other charts worldwide. As of 2017, it has sold 30 million copies, making it the best-selling debut album of all time. Attention girls, as this is a unisex product it may run a little bit larger. Therefore you might want to order a size smaller than usual!