Internationally, "Behind These Hazel Eyes" was a commercial success. In Australia, the song debuted and peaked at number six on the week ending July 3, 2005. In New Zealand, the song entered New Zealand Singles Chart and peaked at number seven on the week ending July 4, 2005 as the highest debut of the week. In the United Kingdom, the song also debuted and peaked at number nine on the week ending October 1, 2005. In Ireland, the song debuted at number nine on the week ending September 22, 2005, and peaked at number four on the week ending November 3, 2005.