Photo from "Miley's Sweet 16 at Disneyland!"

The Insider' breaks the news that Miley Cyrus will celebrate her Sweet 16 birthday during a once-in-a-lifetime bash at the Happiest Place on Earth -- Disneyland!  

The 'Hannah Montana' star is also sharing the spotlight during the private party with some deserving young people from Youth Service America who've been making a difference in their communities.  

And 'The Insider' has learned that Mile...