[1] Pollstar and Billboard provide boxscores, which are the primary data showing the commercial performance of tours, but since not all concerts are reported to them, especially before 2000, the number of tickets may rely on estimations by other sources.
Tours may score large total attendances because of their number of shows, which can span multiple calendar years.
[4] Taylor Swift's Eras Tour later became the first run by a solo and female act to reach the two milestones.
Tina Turner, Cher, Madonna, Swift and Pink are the only women with a tour attended by 3.5 million people or more.
Coldplay are the only act to sell a million tickets in two different days, achieving the feat with the first two European legs of the Music of the Spheres World Tour.