Norah Jones is known for her unique blend of jazz, pop, and folk influences, and she often incorporates elements of various musical scales and styles in her work. One scale that is frequently associated with jazz and that she might use is the blues scale or the pentatonic scale. However, if you're referring specifically to a "6 note scale," it could be related to the Hexatonic scale, which consists of six notes.
If you are referring to a specific scale used in one of her songs or albums, please provide additional context, and I would be happy to help further!