One of the most popular Shakira shows of 2018 was Saturday September 1st at MGM Grand Garden Arena. Interest for that show was at its highest when ticket sales began. Interest continued and ticket prices increased as it got closer to September.
Across all Shakira shows in 2018, interest was strongest right when the shows were announced and tickets went on sale. Meanwhile, ticket prices typically fell about 5 - 10% from the date a show was announced until the days leading up to the show.