KENNEDY: I thought Britney was back on the straight and narrow. But there’s something toxic she can’t resist…

A few months ago Britney Spears looked as though she was making a positive U-turn on her long and troubled road in and out of sobriety, sanity and celibacy.

With the release of a smash hit memoir, a reunion with her long-estranged sons and a public swearing off of boys and pills, it felt like we were getting a glimpse of our former pop goddess who was ready to regain her place atop music’s Mount Olympus.