Tennis star Serena Williams made a surprise cameo during rapper Kendrick Lamar's halftime performance at the Super Bowl on Sunday, showcasing her crip walk - a dance move that originated in Los Angeles.
The moves were a reference to Williams and Lamar's shared roots in the city.
But the performance also recalled a Wimbledon controversy, when Williams faced criticism for a similar dance in celebration of her gold medal after defeating Maria Sharapova at the London Olympics in 2012.
Critics at the time argued the dance was inappropriate and a glorification of gang violence.
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