Lindsay Lohan's Mean Girls co-star Amanda Seyfried fears her former pal and other child stars go "nuts" because they experience success at such a young age.
The actress, who is about to lead Hollywood's all-star Mamma Mia! cast onto the big screen, is convinced young Hollywood stars can't grow-up sane.
And the 22 year old admits Lohan is a perfect example of a young actress struggling to cope in the fame game.
She says, "I've met some people who are just so freaking distraught and who don't know how to handle it, and I've met some (kids) who have their head on straight and are really happy. You try to stick around them.
"I kind of don't expect some of these girls, who've been working since they were two, to be sane. This business is just weird when you're young."
But the actress was quick to dispel rumours Lohan was a liability on the set of their hit film.
She adds, "Lindsay was great on Mean Girls. I think that was before she got a little nuts."