A woman displays a placard outside the National Footbal League

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A woman displays a placard outside the National Footbal League (NFL) headquarters in New York on February 16, 2016, supporting US signer Beyonce’s performance at the 50th Super Bowl. With slogans against police brutality and celebrations of African beauty in her new song, Beyonce has suddenly transformed from crowd-pleasing entertainer to outspoken spokeswoman for the burgeoning Black Lives Matter movement.Beyonce took the message to the largest possible audience as she performed the song during the halftime show of the Super Bowl, the most watched US television broadcast of the year which drew more than 111 million viewers.