From the highest grossing tours as listed by Wiki, here's the top 10 list of average audience sizes for those tours...

1. Sticky & Sweet, 2008-09, 41,700 (Madonna) - 85 shows

2. Taking Chances, 2008-09, 27,400 (Celine) - 132 shows

3. Speak Now Tour, 2011-12, 25,300 (Taylor) - 111 shows

4. Funhouse Tour, 2009-10, 21,500 (Pink) - 163 shows

5. Confessions Tour, 2006, 20,171 (Madonna) - 60 shows

6. Do You Believe? Tour, 1999-2000, 18,750 (Cher) - 180 shows

7. Re-Invention Tour, 2004, 16,400 (Madonna) - 56 shows

8. Circus Tour, 2009, 15,500 (Britney) - 97 shows

9. Monster Ball Tour, 2009-11, 12,400 (Gaga) - 201 shows

10. The Farewell Tour, 2002-05, 10,800 (Cher) - 326 shows

** There may have been tours with higher average audiences that were not listed in highest grossing tour due to ticket prices being lower - so this list isn't all-inclusive without the information about lower grossing tours.

Expected that GaGa would be hurt on this list, I mean the woman did so many shows.

Beyonce and Christina

and Beyonce 209,5 M dollars won just with 2 world tour..

Rihanna and Pink

People make their tickets expensive as ****

Yeah, that needs to be fixed. I was gonna say Xtina's too but she's already been clocked.

Gaga might make the top 3 if the average for the BTW Ball stays high. It's at $2.75 million right now.

The MDNA tour will kick her out, though

Miley's Gypsy Heart Tour made an average of $1,238,095 per night, and her Wonderworld Tour made an average of $1,196,428 per night. Which would put her at 7th and 8th place, respectively - if she were to be included.

I think it will be really close honestly. The MDNA TOur from what I've seen so far it grossed about 35 million from 8 dates and will probably do about 140 million in Europe total, 120-130 from the US/Canada and then about 40/50 million from Latin/South America so it will do about 300-325 in the end for the first leg at least. Is GaGa's tour doing similar? If so it will be close. lol

Madonna slaying since 1982!

Madonna will slay again this year. And the next tour too.

I don't know where those numbers came from. There has been no official reports from Billboard or Live Nation.

Amazing!

I think MDNA will gross more than S&S ($400m);

1. It has more dates.
2. It has higher ticket prices.
3. It has similar attendence.