A signed 8x10 inch photo (beach pose), autographed in-person by Christina Aguilera. In-Person Signature. Authentication: ACOA Certification Number: SC64484 Collector Note: Signed photos featuring Christina Aguilera are highly desirable, representing one of pop music’s most powerful vocalists and enduring stars. Beach pose images are especially eye-catching and display beautifully, making them popular among collectors. Authenticated in-person signed photographs are highly sought after by fans of pop and contemporary music memorabilia. A display-ready, standout collectible from a true pop music icon.