Underwood's music career began with the release of her first single, "Inside Your Heaven", on June 14, 2005. The song debuted at No. 1 on the "Billboard" Hot 100, with Underwood becoming only the third artist to debut in the top slot since chart policy changed in 1998. She also broke "Billboard" chart history as the first country music artist ever to debut at No. 1 on the Hot 100 and the song became the first song from a country artist to go to No. 1 on the Hot 100 since country group Lonestar's "Amazed" did so in 2000. "Inside Your Heaven" is the only single by a solo country artist in the decade of 2000–2009 to reach No. 1 on the "Billboard" Hot 100 chart. It also debuted at No. 1 on the "Billboard" Pop 100 and on the Canadian Singles Chart, topping it for seven consecutive weeks, becoming the longest-running number one single of 2005 in Canada. It sold nearly one million copies and was certified gold by the RIAA and double platinum by the CRIA.