Once upon a time ZZ Top proclaimed "I'm bad, I'm nationwide."
In these days of globalization and the Internet we're all nationwide, and worldwide for that matter. Badness, however you define it, comes separately.
With all this in mind, I've listed below places other than the United States where online sellers are offering The Best Mariachi in the World/El Mejor Mariachi del Mundo.
If I have missed any countries, please let me know.
Republic of China (Taiwan)
Republic of Korea
Republic of South Africa