With max capacity (if they used standing capacity in some) Adele would be at:
SSE Arena - 22,000
3Arena - 29,000
Manchester Arena - 84,000
The O2 Arena - 80,000
SSE Hydro - 13,000
Genting Arena - 64,000
Tele2 Arena - 45,000
Telenor Arena - 23,000
Forum Copenhagen - 10,000
Jyske Bank Boxen - 15,000
Mercedes-Benz Arena - 34,000
Barclaycard Arena - 32,000
Lanxess Arena - 40,000
Hallenstadion - 26, 000
MEO Arena - 40,000
Palau Sant Jordi - 36,000
Verona Arena - 30,000
Ziggo Dome - 68,000
AccorHotels Arena - 40,600
Sportpaleis - 69, 003
Total possible attendees: 800,603
So to break Madonna's record:
Average gross per show: $8,320,678.90
Average ticket per show: $509.26
I think Barbara Streisand actually charges prices like these.