A new book on Lady Gaga's early days is ruffling her ex's feathers.

Gaga's longtime friend Brendan Jay Sullivan penned Rivington Was Ours, a book detailing her time on New York's Lower East Side before she made it big. Lady Gaga's ex Luc Carl believes that he has been painted as a villain in the memoir, threatening to sue Sullivan and his publisher, HarperCollins.

Sullivan, a DJ, claims in the book that Carl - a heavy-metal drummer and radio personality - was "inattentive and possessive" boyfriend who controlled many aspects of Gaga's life and career. At one point, Gaga told Sullivan that Carl had told her, "I hope you fail," which likely just fueled the Mother Monster in her efforts.

Last year when questioned about his relationship with Gaga, Carl said, "I was f - - king miserable, and it wasn’t her fault." Perhaps he's suing so that he can publish his own side of the story?