A signed 8x10 inch photo (bikini pose), autographed in-person by Christina Aguilera. In-Person Signature. Authentication: ACOA Certification Number: SC64493 Collector Note: As one of pop’s most celebrated performers, Christina Aguilera remains a staple in music autograph collections. Bikini pose images are visually engaging and add variety to any signed photo lineup. Authenticated in-person signatures carry added appeal for collectors who prioritize firsthand-acquired memorabilia. A bold and highly collectible signed photograph ready for prominent display.