2010: The Year Young Hollywood Grew Up (PHOTOS)

Miley Cyrus, Nick Jonas, Selena Gomez and Demi Lovato all celebrated their entrance into adulthood (aka their 18th birthday) this year, marking the end of an era for a generation of young stars.

So, how did turning 18 change these young stars? Some stumbled a bit while others seem to be strictly on the up-and-up.

Check out Celebuzz’s guide to young stars who grew up in 2010 and share your thoughts and concerns in the comments.