Article continues below advertisementBritney Spears has sold her iconic collection of music to publishing company Primary Wave.In legal documents obtained by TMZ, the pop princess, 44, signed a "landmark deal" with the label in which she offered up her entire music catalog, as well as her rights to her songs.Article continues below advertisementBritney Spears Is Happy That She Sold Her Music RightsSource: MEGAThe pop star sold off her music catalog.