There are a few reasons why Beyonce is considered a mezzo-soprano. First, her vocal range extends from the lower note of F#3 to the higher note of C5. This puts her squarely in the mezzo-soprano range. Additionally, Beyonce's timbre is typically classified as warm and rich, which are also characteristics of a mezzo-soprano. Finally, Beyonce often sings music that is written for mezzo-sopranos, which further cements her place in the mezzo-soprano category.