Mariah Carey has announced an upcoming two-disc album release, titled The Rarities. Carey says the project, out Oct. 2, is a celebration of 30 years of music. According to an interview with Good Morning America today, the two-disc set is full of unreleased track from her musical archives. Carey also said in a tweet:  “This one is for you, my fans. It’s to celebrate us, and to thank you for ???? years of pure love and support. I am so grateful to you ???? THE RARITIES album is out October 2  Pre-order now: https://t.co/vZ4SBXQ8hg You can preorder the The Rarities here.