What present did Miley give Nick for his birthday?
i believe that is her business not yours or anyone elses...no offense :-(
There is no evidence, contrary to what you read in the tabloids, that Nick and Miley are married, nor even engaged. They are both performers, so they see each other sometimes at music industry events or during concerts; because they seem to be friendly, that is enough for the tabloids to make certain assumptions. But as far as we know, Miley is enjoying her freedom and has many friends who are guys.
Miley Cyrus' dog ag necklace does not say "nick has diabetes" or "Miley H Cyrus". By the way Miley's real name is Destiny Hope Cyrus, that's not my point. Miley's dog tag necklace say something like... "Help Jonas Diabetes", or "help Diabetes". It does give some clues about Nick but those Nick mysteries (all the ones that are about Nick and Miley) are still trying to be solved. Any questions "about it", come and ask…