The show hasn't even started yet, but the audience has been singing along for a while, blasting through the sound system. They follow along, wielding a large, pink and black plastic hammer that lights up when he moves it—one of the gadgets of the most successful merchandising of the night - while images of Jisoo, Jennie, Rosé and Lisa, the members of Blackpink, the Korean band of the moment that performed this Saturday, August 9 at the Estadi Olímpic Lluís Companys in Barcelona, are projected on the screen.