Beyonce Split With Jay Z For A Year… Over Rihanna?

Beyonce and Jay Z

In an unauthorized biography about Beyoncé, called Becoming Beyonce, the author drops a bombshell.

The book claims Bey reportedly split from husband Jay Z for about a year, when rumors that he had hooked up with protegé Rihanna surfaced.

Author J. Randy Taraborrelli says the rumor was circulating when Rihanna was just 17 years old.

"[The rumor] was total fiction," the author tells Entertainment Tonight. "Beyoncé didn't know what to make of this, and it actually ended up breaking them up for a time. They spent maybe a year apart from each other because Beyoncé just wasn't sure what to make of the situation with Rihanna."

Taraborrelli goes onto explain that the rumor was most likely the result of a publicist trying to boost Rihanna's career at the time.

The book also claims Rihanna was the source of conflict for Jay's infamous fight with Bey's sister Solange in the elevator. "People told me that there was a whispered argument that night having to do with Jay wanting to go to a party [for] Rihanna," Taraborrelli said. "Beyoncé did what Beyoncé does. She laid down the law... it was a whispered married couple's argument that would've gone by completely unnoticed had not Solange overheard it."

Becoming Beyoncé drops Oct. 27. Pre-order yours at Amazon.