Article continues below advertisementKaty Perry and Justin Trudeau turned heads during a romantic outing in Paris just in time for the singer's birthday celebration.The former Canadian Prime Minister, 53, and the "Dark Horse" hitmaker, 41, were spotted holding hands after a lavish birthday date on Saturday, October 25. Footage obtained by TMZ displayed Perry dazzling in a sleek red dress, receiving a rose from a fan outside Crazy Horse Paris, where she attended a cabaret performance.