Hello Aroso, You could say " la dolce vita". It doesn't mean literally the"beautiful " life , it means rather " the good, sweet and pleasant life", but i think it is nice to use that one as an option.

Sorry, Aroso. I should have thought more carfeully before randomly give an answer.

in italian "la bella vita" refers to your lifestyle, generally it means that you lead the good life or a life of pleasure. "fare la bella vita" to live in a confortable and wealthy way. think about the real meaning of these words.What your friend wants exactly to say with his/her tattoo?

The beautiful life=La bella vita