Nicole Richie
It's pretty common for celebrities to adopt, but not all of those kids become celebs in their own right. Nicole was raised by rockstar legend Lionel Richie and his now-ex-wife Brenda Harvey-Richie in California. Though it's never been confirmed, there are rumors that one of Nicole's biological parents is a former bandmate of Lionel. At age nine, she officially became part of the Richie family.