Holly Montag And Justin “Bobby” Brescia Dating?

This is whack.

Us Magazine reports that Holly Montag, 27, is dating Audrina Patridge’s ex-boyfriend, Justin “Bobby” Brescia, 29.  Ummmmm.  While Audy P is off saving her sinking ship on VH1, Montag and Brescia have been dating for awhile, confirms a source.

PHOTOS:  A Vapid Gathering Of The Hills

But another insider tells Us that it probably won’t work out (shocker. SHOCKER).  “He’s reckless and will disappear in his house for days at a time,” claims the source. “He’s not reliable.”  Even Kristin Cavallari couldn’t tame a cray cray Brescia, who was always talking nonsense and riding off in his motorcycle.

What do you think of this new couple?