While Mariah Carey’s anticipated “Memoirs” album has slid back a few weeks, three of the Grammy-winning diva’s discs are being pulled together for an unexpected box set release. Confirmed to arrive in stores and at digital retail, Carey’s last three albums “Charmbracelet (2002),” “The Emancipation of Mimi” and “E=MC2” have been combined for a MC laden collector’s set. According to Rap-Up, the three-CD package will also provide a slot for “Memoirs of an Imperfect Angel,” Carey’s “Obsessed” featured album, also due September 15. As reported earlier this week, Carey’s “Memoirs..” will feature ads from brands like Angel Champagne, Elizabeth Arden, and the Bahamas Board of Tourism. “Memoirs of an Imperfect Angel” is Mariah Carey’s twelfth studio album.