Duff Bags A New Boyfriend

American pop teen Hilary Duff has found love once again, after her split from Aaron Carter.

The 16-year-old SO YESTERDAY singer, who claims she inadvertently dated Carter while he was still romancing Freaky Friday beauty Lindsay Lohan, is now the girlfriend of Cheaper by the Dozen co-star JORDAN MASTERSON, 17.

The teens met more than a year ago, but romance blossomed after they hooked up again at a youngster's club in Encino, California.

Duff coos, "He's so nice. I love him."

Duff's sister HAYLIE adds, "I couldn't be happier. Jordan's a great kid and he's an actor, so he understands."

Jordan is the younger brother of THAT '70S SHOW star Danny Masterson.