two peas in a pod

It's being reported that Britney Spears is worried that her life is frighteningly like Princess Diana's and that she may share her fate of being a famous blonde mother who will die as a result of being harried by a flock of papparazi.

Yeah, you know, Britney is just like Diana.

Except for the education, the intellect, the philanthropy, the culture, the breeding, the wardrobe, the good taste, the sobriety, the worldwide adulation, and underwear, it's almost impossible to tell them apart.