Britney Spears has shared why she went off on Justin Timberlake last week.

“I’m writing a book at the moment and as it’s actually healing and therapeutic…it’s also hard bringing up past events in my life…I’ve never been able to express openly!!” Britney wrote. “I can only imagine that I do sound childish but I was extremely young when those events took place…and addressing it now…I’m sure it sounds irrelevant to most and I’m completely aware of that !!!”