Bey hasn't toured in years. I know a lot of people who want to see her because they now know how good she is, even though they aren't really big fans. Her tickets can be pricey, but I think the demand will be there, especially if she scores one or two global hits.

Beyonce for sure.

Taylor.

when it comes to touring Beyonce is quite global and if her next era has some good booty shaking songs with videos that have amazing choreographies, she will snatch the crown.

P!nk, by a million miles.

Her tour is already sold out and stands at 94 dates. Tickets are more expensive now, so I think she should gross $150 million just with that amount of dates. Plus, she stated that the plan is to go to America after Australia and than back to Europe again. Truth About Love Tour should gross around $250 million at the end. I also think that she'll tour stadiums around Europe again.

Taylor will probably tour N. America and Europe. She's definitely not big in Europe and Australia like P!nk.

I did not know the other two are touring next year.

All the tickets for the RED tour will be priced under $50.
I still think Taylor can pull it off.

P!nk. Followed by either Taylor or Beyonce. I love Rih but I don't think her tour will have too many dates as her eras are 'small'.

P!nk will gross over 70M+ from Australia alone.