Justin's Mom mix-up?

Did Justin Bieber's mom suffer from a case of mistaken identity? It's totally true! At a recent Justin concert, Justin's petite mom, Pattie, was mistaken for a young fan! Justin and his mom didn't mind because fact is, she's his biggest fan! Justin recently spilled that he loves having fans of all ages! "I've got some young fans," he smiles. "My mom is 35, so she's my oldest fan."