Beyonce is the perfect middle between Mary J Blige/ Lauryn Hill hip hop leaned R&B and Mariah/Janet pop influenced R&B. More on the Mary/ Lauryn side though.
I see Mary J Blige and Ciara going for a Disclosure/Diplo type of production mixed with R&B lyrics and vocals. I wonder if Beyonce will go the same route but creating sth more out the chain thanks to Boots and The Dream.