I did not see this posted, so here u go:
http://www.ticketnews.com/view/top_events_list
Top Events Power Score Ranking Methodology
"TicketNews Exclusive Rankings and Power Scores are based on ticket sales from the TicketNetwork ExchangeTM, the world's largest secondary market exchange. Two factors are used to calculate a power score: total ticket sales from the given event and total ticket sales within the category. Since the sum of all events' power scores equals 100 in any given category, an individual event's Power Score represents its category-specific significance. Top Seller Power Scores should only be used to compare sellers within a particular category, and not across categories."
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My girl slaying...