Norah Jones - "Don't know why"
This was written in 1999 by a songwriter and guitarist named Jesse Harris. A few weeks after he wrote it, he recorded it with a violinist and released it under the name Jesse Harris and The Ferdinandos. He sold the album on his web site.
Harris knew Jones because they were both musicians in New York City, but he didn't have Jones in mind to sing this because she was a Jazz singer. When he joined Jones' band in 2000, he considered using a female voice on the song and offered it to Jones. She changed the key to fit her voice and added a drum beat. She still thought of it as just a demo, but it got the attention of an executive at Blue Note Records, who offered her a record deal.
This was recorded as a demo in one take in October, 2000. Harris played guitar and almost stopped the take because he didn't like the mix in his headphones. He kept going and was glad he did, since that was the keeper. Jones and her band were willing to do another take, but the engineer, Jay Newland, thought it was perfect and wouldn't let them. They did try some more takes in another session, but the results were too convoluted, and Jones was assigned to a different producer, Arif Mardin. He had worked with many famous artists, including Aretha Franklin, and was brought in to capture Jones' distinctive sound. He did this by keeping the original demo take and adding some guitar and a vocal harmony, which made Jones harmonize with herself.