"Don't Know Why" is a song written and composed by Jesse Harris that originally appeared on his 1999 album, Jesse Harris & the Ferdinandos.

Jones' version of "Don't Know Why" was released on January 28, 2002, peaked at number 30 on the US Billboard Hot 100 and was a critical success, winning three Grammy Awards in 2003 for Record of the Year, Song of the Year, and Best Female Pop Vocal Performance.

[2] Jones' piano-playing has been compared to that of Floyd Cramer, having a "style and grace, a musical maturity not found in many keyboard players today.

"[3][4][5] A music video directed by Anastasia Simone and Ian Spencer was released in 2002.

It features Jones performing the song on a gray beach at sunrise, on a rocky pier, and at a beach rental stand accompanied by a wooden piano while undersea images are projected onto the walls.