Mandy Moore 'Heartbroken' Over DJ AM's Death

8/29/2009 5:54 PM PDT
A rep for Mandy Moore, who used to date DJ AM, just gave us this statement:

"I am absolutely heartbroken. For those of us lucky enough to have known him, Adam radiated a contagious exuberance for life and also personified the very definition of a true friend. To say that he will be missed beyond words is an understatement. My heart goes out to his loved ones."