A signed Funko Pop figure, autographed in-person by Billie Joe Armstrong (vocals/guitar) of the band Green Day. In-Person Signature. Authentication: GA (Global Authentics) Certification Number: GV935960 Collector Note: Signed Funko Pop figures of Billie Joe Armstrong are highly desirable, representing the iconic frontman of Green Day, one of the most influential punk rock bands of the modern era. Authenticated signed collectibles tied to legendary rock artists are sought after by collectors of music and pop culture memorabilia. A display-ready, standout collectible from a true punk rock icon.