When Pacino and DeNiro do a film together, you know it's something special; the same could be said for Mary J. Blige and Usher collaborating on a song. On Mary J’s new album, Growing Pains, the two R&B legends come together for the harmonious ballad, Shake Down. While Usher has taken time off from the industry, he knows that a feature guest should never outshine a song’s spotlight singer. Having already collaborated with R&B A-listers like Alicia Keys and R. Kelly, Mr. Raymond’s joint effort with Ms. Blige sits comfortably in line with the rest. Growing Pains is set for release on December 18th courtesy of Geffen Records.