This is one of those pictures that caused a media **** storm in black media about Beyonces skin color and hair color looking too bright (regardless of an obvious flash being why). Add in the fact that Rihanna said it could destroy a nations self esteem and you have a freshly boiled pot of shade.
After more thinking: We might be overthinking the shade, you never know. Maybe Rih likes this picture more than others; everyone has his/her different taste.