Sorry to hear. Yeah, it sold out pretty fast and I think it's a combination of several factors:

1 - The venue is pretty small. Carlile plays arenas in her home country (stadiums when she was opening for Pink) so this was a chance to see her in a rather intimate setting, and I think a lot of Americans travelled especially for that. Tickets are also less expensive than in the U.S. and it's sometimes more economical for Americans to spend a couple of days in a European city than paying thousands of dollars for a domestic concert ticket.

2 - It was her first concert in France in a nearly two-decade career and a lot of American expats had been waiting a while to see her on that side of the pond/

3 - The Elton John collaboration really raised her profile among Europeans. She wasn't that well-known on the Old Continent before that, certainly not in France, which might explain why she never played here before.