right now Gaga to be honest ....
but Overall I just don't know .... Britney could've grossed nearly $500M in touring
considering the inflation adjustment .... with just few dates , because Britney and Madonna don't do more than 100 dates per tour.
Britney is top 10 or even top 5 of the top touring female acts of all time ...
but Lady Gaga is really a huge touring act, she is doing really well right now
