Cameron was born in Seattle, Washington as Chloe Celeste Hosterman. She is the daughter of Philip Alan Hosterman and Bonnie Wallace, who later got divorced, and has an older sister, Claire Hosterman. She grew up in Bainbridge Island, Washington. When she was a child, she attended Sakai Intermediate School. At the age of 8, she began acting in community theater at Bainbridge Performing Arts. When she was 14, her family moved to Los Angeles, California, where she sang in Burbank High School"s National Championship Show Choir. Cameron is of Scottish and French descent, and is a fluent speaker of French, having spent many years of her life growing up in France. She has stated she was bullied through her entire school experience, starting in fifth grade, through the end of high school. Regardless of the pressure at school and fitting in, she stayed focused on her dreams of becoming successful in entertainment: "I became very passionate about [becoming an actress and singer]. I fully immersed myself". Her father died in 2011 when she was 15 years old.