1. She Started Off on 'Barney'
That's right, at 7 years old, Selena Gomez spent her days with Barney, the big purple dinosaur. "I was very shy when I was little," she said in a 2008 interview. "I didn't know what 'camera right' was. I didn't know what blocking was. I learned everything from Barney." That's also where she met Demi Lovato.