Pharrell Williams has delivered a powerful speech to announce legislation that would make Juneteenth – the day that celebrates the end of US slavery in 1865 – a state holiday in Virginia.He was joined by governor Ralph Northam to discuss the law, which is set to pass the Democrat-controlled state legislature.In his speech, Pharrell opened up on his own ancestors, who were slaves, as well as the state’s role in the slave trade.“This is a very special moment,” he said.