Carrie Underwood's debut album, Some Hearts, has been certified quadruple platinum for shipments of 4 million copies. "There are so many people that have done so much -- songwriters, producers, all the people at the label," Underwood said. "Country radio has been awesome to me, and they've played my music, and people have requested my songs and bought the albums and seen me in concert. I mean, it takes 8 million people to sell 4 million copies! It's just amazing what everybody has accomplished." The album includes two No. 1 singles -- "Jesus, Take the Wheel" and "Before He Cheats."