It looks as if Hilary Duff and Lindsay Lohan have abandoned their rivalry and actually seem to like hanging out together.
Hilary Duff, 19, told People magazine:

We are both adults and whatever happened, happened when we were young.
She added:

It's over.
The new friends were spotted in the Hollywood night club chatting to each other, dancing together, and at one point, according to the Chicago Tribune, Hilary Duff and Lindsay Lohan kissed each other's hands. To prove their solidarity, as Hilary Duff's ex-boyfriend Joel Madden showed up at the bar with current girlfriend, Paris Hilton, both Lindsay Lohan and Hilary Duff split for the bathroom together. To top off the recent friendly activities, Lindsay Lohan appeared at the release party for, Dignity, the new album by Hilary Duff.
Hilary Duff told People magazine that Lindsay Lohan is:

really fun.
Hilary Duff said:

We were hanging out the other night and she's a nice girl.