Sources say that the late DJ AM was "completely devastated" over a recent breakup with his girlfriend, Hayley Wood, with whom he split within the last week.

Hayley Wood was the one who called off their relationship.

"She ended it, and he didn’t want it to end. The breakup hurt him. He hadn't been in a good place lately. For the past week, he wasn't really around, he was just keeping to himself, and he was blowing people off," says a source.

Police found DJ AM dead in his New York apartment yesterday. The celebrity DJ, whose real name was Adam Goldstein, battled substance abuse in the past.

DJ AM with Hayley Wood earlier this year.

According to folks close to him, DJ AM was having a very hard time dealing with post-traumatic stress disorder from the plane crash he survived last September.

DJ AM has been sober for nine years, but sources say the breakup and the stress over the plane crash could have caused him to start using drugs again.

Prescription pill bottles and drug paraphernalia were allegedly found at the scene.

His body was removed last night. The friend who called 911 on Friday, prompting cops to enter Goldstein's apartment, told the dispatcher DJ AM had not been seen for two days, but people were still hearing from him Thursday.

The celebrity spin-meister will certainly be missed by stars and fans alike. Here's a video of Hayley Wood and DJ AM which she posted a few months ago ...

DJ AM and Hayley Wood