They’ve been married for six years, but Jay-Z and Beyoncé have never co-headlined a tour together, until now. Hot on the heels of the official announcement of their upcoming co-headlining On the Run tour, a 16-city North American jaunt kicking off June 25 in Miami and concluding August 5 in San Francisco, the demand for Jay-Z & Beyoncé tickets is through the roof for what is guaranteed to be one of the biggest tours in recent years. It’s also one of the most expensive.