"Unwritten" is a song by English singer-songwriter Natasha Bedingfield for her debut studio album of the same name. It was released on 29 November 2004 as the third single from the record. The song was written by Bedingfield, Danielle Brisebois, and Wayne Rodrigues and produced by Wayne Rodrigues and Danielle Brisebois. The single was released as the album's third UK single (November 2004) and second US single (September 2005). In 2006, "Unwritten" became the theme song for the reality television series The Hills. It reached number five on the Billboard Hot 100, becoming her first top-ten hit in the United States.

"Unwritten" was the most played song on U.S. radio during 2006 as confirmed before her performance at the Diana concert, and as of March 2006, was certified platinum in the U.S. The song is Bedingfield's most successful single in the US, along with "Pocketful of Sunshine"; both songs peaked at number five on the Billboard Hot 100. The song earned Bedingfield a Grammy nomination in Grammy Award for Best Female Pop Vocal Performance at the 49th Grammy Awards but she lost to Christina Aguilera's "Ain't No Other Man".

Peaking at number five for two weeks in the United States, "Unwritten" charted at number six on the 2006's Hot 100 year-end chart. "Unwritten" stayed in the Hot 100 for 38 weeks, thirteen of those inside the top ten. Estimated sales in the United States for "Unwritten" are 2,731,000 as of June 2011. This was the third highest ranking for a female artist for 2006 behind "Hips Don't Lie" by Shakira and Wyclef Jean, and "Promiscuous" by Nelly Furtado and Timbaland.

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