One of the most popular Beyonce shows of 2018 was Saturday September 22nd at Rose Bowl Stadium. Interest for that show was at its highest when ticket sales began. The interest resulted in high ticket prices that dropped as the show neared.
Across all Beyonce shows in 2018, interest was strongest right when the shows were announced and tickets went on sale. Meanwhile, ticket prices typically fell about 20 - 25% from the date a show was announced until the days leading up to the show.