@Genki+ do you prefer r'n'b or pop, or all of it?
Style, Queen of Hip-Pop and PLAY are awesome mix of r'n'b and hip-pop and they're very catchy!
And her odler albums are mostly pop, except Genius... Namie also has very nice B-sides as: exist for you, Drive, Darling, the Speed Star, Nobody...
Well, i didn't say anything new, but i maybe helped a bit