I first saw Flash Tattoos this summer at Coachella, and bought a few different kinds for a wedding. Such a hit! They added the perfect amount of sparkle to our pics, and all the different patterns and designs let each person pick what was right for them. We even gave the groomsmen their own special tats!
I was a bit skeptical that they would last the stated 4-6 days, but I'm on day 5 and they're just beginning to wear off. I ordered and shipped to a US address, so I can't speak to international options, but they have a very clearly stated shipping section.
If you're looking for something fun, easy and inexpensive to bring to any party, I'd definitely recommend Flash Tattoos!