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Princess Caroline of Monaco threw a Mexican-themed bash aboard her yacht in Italy yesterday, complete with a somebrero, a moustache and of course, a frosty blended drink!

Grace Kelly's oldest daughter has been on vacay with her family off the coast of Stromboli, where they've been enjoying the local food (like pizza!) and teaching her girls how to dive off the bow of the yacht.

Ahhh, the life of a royal...