How can I buy show tickets online with my u.k.credit card while visiting in California .?

i found this with ticketmaster

International Will Call for US Events

If you order tickets to a U.S. event and you have a billing address that is outside of the United States and Canada, then you may be obligated to use international will call and may have to place your order at least 10 days prior to the event. You must provide an email address, along with a local telephone number where you can be contacted up to the day of the event. Tickets will be held in will call at the venue box office where the event will take place

You will have to purchase the tickets inperson, either at the box office of the location or at a retail location (locations are listed at ticketmaster.com). If those don't work, you can do the international will call option.

Your can also purchase your tickets for a 3rd party company, like Barry's Tickets.

I'm pretty sure you can buy them at Lucky Duck Tickets. www.luckyducktickets.com You can save 5% too with code SAVEABUCK

Ya, that could be a problem. You may have to call the venue and do it by phone?