to receive the RIAA's Platinum certification, which was introduced in 1976 to recognize albums that ship one million copies in the United States. It received its first platinum certification a week after its release (on February 24, 1976), was certified 12× platinum in August 1990, 14× platinum in 1993, and 22× platinum in 1995. On November 10, 1999, the album became the best-selling album of the 20th century in the United States when it was certified 26× platinum. In a 2001 radio interview, Randy Meisner said neither he nor Bernie Leadon were notified of the 1999 certification, "so we had to call and we finally received it." The album was certified 29× platinum on January 30, 2006, and, in August 2018, it was certified 38x platinum under a new system that tallies album and track sales as well as streams, surpassing Michael Jackson's Thriller (certified 34× platinum) to again become the highest-certified album by the RIAA. There is skepticism of the album's RIAA certifications. The additional certifications it received in 1995 indicate it had sold eight million units since 1993, but, per Nielsen SoundScan, it sold fewer than a million copies during that period, as well as just over five (rather than 17) million copies from 1991 (when SoundScan began tracking) to 2006, and 6.4 million album-equivalent units from 1991 to February 2020 (again, far fewer than the certifications credit). In 2018, Sony Music CEO Rob Stringer stated the album only sold 2.3 million units from 2006 to 2018, yet it received certifications for nine million additional units. Warner Music, which distributed Their Greatest Hits, claimed the figure came from newly discovered sales dating back to 1976, but a representative from Michael Jackson's estate noted sales audits are usually restricted to three years and said, "The notion that they can go back 10, 15, 20 or 30 years and find units that were never counted before is absurd, they reviewed these records before. Why didn’t they find those uncounted records then?" Worldwide, the album has sold over 45 million copies as of 2020, making it the best-selling greatest hits album, and the third best-selling album, of all time. Track listing Personnel Eagles Glenn Frey – guitars, vocals; piano Bernie Leadon – guitars, backing vocals; banjo, pedal steel, mandolin Randy Meisner – bass guitar, vocals Don Henley – drums, vocals Don Felder – guitars on "Lyin' Eyes", "Already Gone", "One of