The long-running feud between the two makes a cameo in the book, with Mariah Carey even poking fun at her now infamous "I don't know her" comment about Lopez as she detailed how ex husband Tommy Mottola allegedly tried to derail her career following their divorce.
While she writes that she understands "Glitter" wasn't exactly Oscar bait, she doesn't think it "deserved" the hate it got at the time -- and places at least some of the movie and the soundtrack's failure on Mottola.
She accused her ex "and his cronies" of physically pulling standees and other promotional items for the album from record stores, before claiming he "interfered with the 'Glitter' soundtrack."
While writing about the alleged "sabotage" to the soundtrack, Mariah Carey explained she had originally selected Yellow Magic Orchestra's "Firecracker" to sample on the lead single, "Loverboy."
Though she doesn't name Jennifer Lopez or her song "I'm Real" by name, that single also includes the sample and was released just ahead of "Glitter." None of this is new, it caused controversy at the time and has always been credited as the source of their feud.
Making matters worse, Mariah Carey said she and Ja Rule worked on a song together, before Tommy allegedly called up "his manager Irv Gotti, asking him and Ja to collaborate on a duet for the same female entertainer's record -- leaving me to scurry and remake the song."
Ja Rule appeared on the remix for Jennifer Lopez's "I'm Real," while Carey reworked the song to sample Cameo's "Candy" and enlisted Da Brat for what she calls in the book a "blistering and very real rap on the remix."
After writing about her subsequent "breakdown" during the promotional blitz for "Glitter" and blaming some of the film's failure on its release so close to 9/11 -- the soundtrack literally dropped September 11, 2001, while the movie came out later that month -- Mariah Carey took one final shot at Lopez and Mottola.
Ahead of the book's release, Mottola simply told Page Six, "I am deeply gratified to have played that role in Mariah's well-deserved and remarkable success, and continue to wish her and her family only the very best." Lopez, meanwhile, told Andy Cohen in 2014 she didn't "have a feud against" Carey "at all," saying the two had never met, didn't know each other and she would actually "love to be friends with her" (watch the video below).