[user5994461]

This might approach 10^6 if you consider the largest band tours going around the world and filling stadiums with 50 000 people.

[tlbsofware]

Don’t you mean 5 x 10^5 ? ;)

[aurelianito]

They just need to fill 10 stadiums and it's done. The Rolling Stones did this in Buenos Aires, for example.