It's been months since their breakup, but Hilary Duff is still seriously hating on ex-BF, Joel Madden! "All of the going out he did after we broke up sort of shocked me," she tells August's issue Seventeen magazine. "Like, that's just so out of character for him, and when we were together, he hated stuff like that, so I felt like I didn't really know him as well as I thought I did." (That's called moving on, sweetie...)

She also told the mag that she sees a family in her life. "I still want the cookie-cutter American dream -- to get married, have kids, and have a house with a picket fence," she says. "I still believe that marriage can work." Bet she didn't think Joel would be attaining that dream before her! Oh well, she can sing away the tears when she performs "Stranger" live on So You Think You Can Dance this Thursday.

P.S. -- Sources for Star say NicJoel's bundle of joy is a boy. Guess we'll find out for sure in about six months!