Mariah Carey, 50, knows how to celebrate Juneteenth in style! The Emancipation of Mimi singer posted the cutest photo with her twins, son Moroccan and daughter Monroe, 9, at home on Friday, June 19. “At our virtual BBQ last night, celebrating #Juneteenth,” she tweeted on Saturday, June 20, adding a black heart and a “1865” fist icon representing the historic day when the last remaining enslaved African Americans were free.