He is best known for his 2005 hit song “Bad Day”, which he also wrote, and which spent five weeks atop the Billboard Hot 100. Powter was the only solo artist to register a #1 hit in that year without previously having had another song chart in the Hot 100. In the United States, “Bad Day” was used extensively on the television series “American Idol” in its fifth season. Powter sang the song live at the end of the final show of that season on May 23, 2006. In December 2009, Powter was named as the decade’s top One-Hit Wonder by Billboard.