Every Guest on the Rolling Stones' New Album Foreign Tongues, Explained

The Rolling Stones' Foreign Tongues pairs Mick Jagger and Keith Richards with an eclectic lineup of guest musicians, including Paul McCartney, Robert Smith, Steve Winwood, Chad Smith, Bruno Mars, and more. Here's the list of every featured guest, how each collaboration came together, and why Charlie Watts' posthumous appearance may be the album's most meaningful moment.