It appears that Kyary’s concerts in Seattle, San Francisco, Chicago, Toronto, New York City, Sydney, and London (edit: Ticketmaster still has some tickets left for London, but they will go fast! Ticketweb and Stargreen have sold out) are now officially sold out. Some of these venues haven’t made a statement saying that they’re sold out, but tickets are no longer available to purchase from their official sites/ticket companies basically confirming that they’re sold out. You can buy tickets from ticket resellers such as Stub Hub, but they will be more expensive. You may also be able to buy tickets from people who have extras or can’t make it to the show.
The concert in Los Angeles has a few more tickets for the main floor and the concert in Hong Kong has sold out half the venue already. No word yet on the Paris and Cologne concerts, but I’m guessing they’re selling just as well.
Congratulations to Kyary! She’s truly an international star :-)