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Elvis Presley - Albert Goldman's 1981 'Elvis' has become one of the most controversial unauthorized biographies ever published.

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Elvis Presley - Among other accusations, Goldman described the King of Rock as "a pervert," claimed Elvis was homosexual, and that he plagiarized from other artists.

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Steve Jobs - Steve Jobs's self-titled biographic book by author Walter Isaacson was actually authorized.

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Steve Jobs - However, it didn't lack in meaty details about the life of the Apple founder, such as the story behind his illegitimate daughter, whom Jobs abandoned.

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Jackie O - Author Kitty Kelley penned the biography 'Jackie Oh!' in 1978, which focused not only on the First Lady but also on John F. Kennedy's notorious extra-marital love life.

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Jackie O - The book also explored the fashion icon's love life, reported mental health issues, and the unconfirmed electric shock treatment she supposedly undertook.

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John Lennon - The Beatles member became another one of Goldman's victims when the author published the book 'The Lives of John Lennon.'

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John Lennon - He depicted Lennon as a paranoid and suffering musical genius, and Yoko Ono wasn't painted in a very positive light either. Most surprisingly, he blames Lennon for not one, but several, deaths, including the one of original Beatle Stuart Sutcliffe.

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Tom Cruise - Andrew Morton penned 'Tom Cruise: An Unauthorized Biography' in 2008, and it became a best-seller. The author didn't hold back when it came to the actor's ties and life within the Scientology Church, or even his love life.

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Tom Cruise - Morton was the first to claim that Katie Holmes had to go through an audition process to date Cruise, and that his ex-wife Nicole Kidman even received death threats from the Church.

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Holly Madison -

Holly Madison's memoir 'Down the Rabbit Hole: Curious Adventures and Cautionary Tales of a Former Playboy Bunny' gives insight into her life at the Playboy Mansion.

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Holly Madison - The book is filled with allegations of drug abuse, parties, and catfights between the Playboy Bunnies.

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Simon Cowell - Investigative journalist Tom Bower wrote the unauthorized book 'Sweet Revenge: The Intimate Life of Simon Cowell,' which the music mogul later claimed was "embarrassing."

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Simon Cowell - Among other revelations, the biography gave insight into Cowell's alleged one-night affair with fellow X Factor judge Dannii Minogue.

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Beyoncé - Queen Bey's public persona is so carefully crafted, and her personal life so brilliantly kept private, that fans are always eager to learn more about what she actually gets up to.

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Beyoncé - J. Randy Taraborrelli's book 'Becoming Beyoncé' pulls the curtain on the artist's life, exploring episodes such as her sister Solange and Jay-Z's infamous elevator altercation, and rumors that their daughter Blue Ivy was actually adopted.

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Frank Sinatra - Kitty Kelley caused once again controversy when she wrote 'His Way: The Unauthorized Biography of Frank Sinatra' in 1986. Sinatra himself tried to stop it from being released by threatening to sue her for US$2 million.

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Frank Sinatra - The book told the tales of the musician's alleged connections to the mob, drunk violent episodes, and infidelity.

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Oprah - The star was another one of Kelley's victims, but 'Oprah: A Biography' failed to nail the scandal factor as most of its revelations are already well-known facts.

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Oprah - She mentions Oprah won't give her mother her phone number, and that she didn't live a deprived childhood at all. She also claims to know who Oprah's father is, but won't reveal...

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Barbara Walters - The respected journalist's autobiography 'Audition: A Memoir' is filled with juicy details of her life.

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Barbara Walters - One of the most scandalous stories is the one of her alleged love affair with married senator Edward Brooke.

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Julian Assange - 'Julian Assange: The Unauthorized Biography' was originally an authorized publication as Assange fully cooperated with Andrew O’Hagan, but he later claimed it was "too personal."

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Julian Assange - The WikiLeaks editor apparently wasn't too happy with the book, which described him as being chauvinist and having "insane-self interest."

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Faith Evans - Evans's 2008 autobiography 'Keep the Faith' became a New York Times best-seller.

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Faith Evans -

The artist revealed what her relationship with the late rapper Notorious B.I.G really was like, the moment in which she walked in on him cheating on her with Lil' Kim, and how she struggled when he was killed.

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