[Machine Translation] Celebrate! 10th Anniversary of Debut! 10YEARS BEST WE R&B" has been a great success, and now DOUBLE is releasing the best of their collaboration on a single CD+DVD! This time, DOUBLE and Namie Amuro's powerful collaboration song "BLACK DIAMOND" is also newly included! The DVD contains the PV of "BLACK DIAMOND" as well as the PVs of the other two songs.