The U2 and Green Day CD single "The Saints Are Coming" is a rare collectible from 2006. This CD, released by Universal Music Enterprises, features a unique collaboration between the two popular rock bands. The CD comes in a paper sleeve with a green color theme, making it a visually appealing addition to any music collection. This out-of-print edition showcases the musical talents of both U2 and Green Day in a single, making it a must-have for fans of both bands.