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Last week H&M rolled out two ads [below] featuring the pop star. In one, her hair is blond and she's wearing a swimsuit, in the other it's brunette and she's wearing a revealing dress. Both ads feature the same song and similar dance routines.

The ad featuring Beyonce as a blonde scored significantly better with consumers, and 16% of consumers mentioned the singer by name, according to research from AceMetrix. In contrast, in the ad featuring Beyonce as a brunette, attention scores were lower and only 7% of consumers referenced the singer by name. Of course, it could be that the Beyonce in a bikini outperforms Beyonce in a wet, clinging dress..."