Led Zeppelin’s 1971 blockbuster, “Led Zeppelin IV” is certified for U.S. sales of 21 million, becoming the fourth highest-certified album of all time. It is behind Michael Jackson’s “Thriller” and The Eagles’ “Greatest Hits 1971-1975,” which are at 25 million; and Pink Floyd’s “The Wall” at 23 million.

Led Zeppelin’s 1975 double-album, “Physical Graffiti,” becomes a Diamond award winner, now certified at the 15-million level. Led Zeppelin is one of only three acts with two albums at or above the 15 million certification level. The others are The Eagles and Pink Floyd.