Lana and Britney both have the best songs in their genres, both have the xfactor, both have unique and beautiful voices, both have a huge diversity in their lyrics, both have the best instrumental, both are the most beautiful women and they're both queens of the new millenium
Considering the fact that she did the SB, Glastonbury and she's been in the industry for over 15 years and her massive Pepsi campaign, her tour numbers are not that impressive.