IN an unauthorised biography by celebrity journalist J. Randy Taraborrelli, it is claimed the couple began rowing over the singer’s ‘obsessive dedication’ to work.

Beyonce and Jay Z love triangle

BEYONCE was led to believe Jay Z hooked up with Rihanna while they were on a secret break, a new book claims.

According to celebrity journalist J. Randy Taraborrelli’s unauthorised biography, Becoming Beyonce, the couple began rowing over the singer’s ‘obsessive dedication’ to work back in 2005, three years before they got married.

Taraborrelli wroed: “He felt that she was too concerned with [work] and overwhelmed by it…She also had a tendency to become moody and defensive when under great work pressure, and it had begun to drive a wedge between her and Jay.

“The two broke up for a time during that year. She flat-out told him she needed a break.”

(Image: WireImage)

It was during their time apart that Jay allegedly hooked up with his protege Rihanna, who was 17 and signed to his label Def Jam.

A former member of Rihanna’s camp allegedly confessed to Taraborrelli that he made up the claims in order to kick-start the Barbadian beauty’s career as a pop star.

They may not have hooked up but the author claims Bey believed the gossip and ended up having trust issues when it came to Jay.

“Beyonce wasn’t sure she could trust Jay when it came to his adamant denials,” he writes. “She couldn’t help but be skeptical.”

The tension allegedly ended in a full-on row in New York at the rapper’s 40/40 club.