A signed 8x10 inch photo, autographed in-person by Christina Aguilera. In-Person Signature. Authentication: BAS (Beckett Authentication Services) Certification Number: BL16184 Collector Note: Signed photos of Christina Aguilera are highly desirable, representing one of the most powerful and influential vocalists in modern pop music. Authenticated autographs from multi-platinum recording artists are sought after by collectors of contemporary music memorabilia. A display-ready, standout collectible from an internationally acclaimed pop icon.