Inside Britney Spears’ downward spiral after ‘out of control’ driving

But Red O general manager Oliver Wynn insisted Spears was not drunk. He said she only ordered “a quesadilla and no alcohol.” Although a fan brought a glass of wine to her table, she “wasn’t drunk.”

The outing came the day after the publication of her ex-husband Kevin Federline’s memoir, You thought you knew. In the story, the former backup dancer and father of Spears’ sons, Sean, 20, and Jayden, 19, claims she used cocaine while breastfeeding, cheated with a backup dancer and once stood outside the boys’ bedroom with a knife in her hand while they slept.

Although Spears’ rep slammed the book, claiming that Federline is “taking advantage of her” and “all she cares about is her children,” the scandalous revelations have caused her to “fly out of control,” the source said.

An insider added that she’s been hitting the booze hard lately to numb the pain of her lonely life, but it’s ultimately doing her far more harm than good.