The latest edition of the multi-artist hits compilation "NOW That's What I Call Music!" has been certified double platinum by the Recording Industry Association of America (RIAA).

The latest edition of the multi-artist hits compilation "NOW That's What I Call Music!" has been certified double platinum by the Recording Industry Association of America (RIAA). Released last month, the ninth album in the series debuted at No. 1 on The Billboard 200, and in its first review, was certified by the RIAA for U.S. shipments of 2 million copies.

The popularity of the 20-track Universal/EMI/Zomba/Sony set, which features songs by Pink, Britney Spears, Ja Rule, and Aerosmith, among others, follows in the trend of the previous eight editions in the series, all of which have at least been certified platinum. Released in 2000, the fifth volume has the highest certification at quadruple platinum, while volumes seven and eight have reached the triple-platinum plateau. Volumes four and seven have also been certified for double-platinum shipments.

Another multi-artist set, the 2001 Interscope soundtrack to the film "Moulin Rouge," reached the double-platinum mark in the RIAA's latest round of certifications. Featuring the Hot 100 No. 1 remake of "Lady Marmalade" by Christina Aguilera, Lil Kim, Mya, and Pink, the album also includes tracks by David Bowie, Fatboy Slim, and Beck, as well as songs performed by the film's stars, Nicole Kidman and Ewan McGregor.

Meanwhile, Michelle Branch is celebrating a platinum reward for her debut Maverick album, "The Spirit Room," and Pete Yorn saw his "musicforthemorningafter" (Columbia) reach the gold mark for U.S. shipments of 500,000 copies.

Reaching new multi-platinum peaks in this go around were titles by Limp Bizkit and Willie Nelson. Bizkit's 2000 release "Chocolate Starfish and the Hot Dog Flavored Water" (Flip/Interscope) was certified six-times platinum for U.S. shipments of 6 million copies. Nelson, meanwhile, picked up quintuple and quadruple platinum awards for his 1978 set "Stardust" and the 1981 collection "Willie Nelson's Greatest Hits (& Some That Will Be)", respectively, both on Columbia.

For a full list of the latest RIAA certifications, click here.