MegaConcert

Under a full moon on Rio de Janeiro's Copacabana beach, Shakira launched her free mega-concert late Saturday, arriving more than an hour after the scheduled start as drones overhead traced the outline of a she-wolf — the nickname that has become part of her pop mythology. Roughly two million people were expected for the free open-air performance by the 49-year-old Colombian superstar, who appeared on a sprawling stage set up beside the iconic Copacabana Palace hotel. The beach has become a showcase for pop royalty in recent…