A new tell-all book has revealed that Beyonce dumped her husband Jay Z for a year over rumors her was having a secret affair with pop star Rihanna!

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According to the book, 'Becoming Beyonce: The Untold Story' by  best-selling writer J. Randy Taraborrelli, the power couple, who started dating in 2000, allegedly split around the time Jay Z scouted then-17-year-old Rihanna in 2005 and managed the launch of her debut single 'Pon De Replay'.

However, it claims the rumors of Jay Z's alleged affair was only spread by PRs to help boost Rihanna's profile but Beyonce "wasn't sure what to make of the situation".

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The book's new revelation has immediately sent fans back into that famous elevator fight between Solange Knowles and Jay Z  in May. Now, questions have been raised whether Rihanna really was the root of their dispute.

Beyonce or her publicist are yet to comment on the book. We'll keep you all posted.