Like every good celebrity who's sorry because he got caught, Sandra Bullock's estranged husband Jesse James has entered rehab as news of a fifth mistress hit the media.

No official word on what type of rehab he has entered, but TMZ.com reports he is being treated at the Sierra Tucson, in Tucson, Ariz., which specializes in drug, alcohol and sex addiction, as well as other disorders. TMZ reports that it has confirmed with a Sierra Tucson therapist that James, 40, attended a 6 p.m. treatment session Tuesday night.

Still no official word from Bullock, 45, but a source close to the Oscar winning actress recently told Us Weekly: "Knowing the kind of person she is, I'd be shocked if she contemplated going back to him." (Source)

If I were Sandra I wouldn't take him back either. Sure rehab can maybe make you forget all about that pesky booze problem or heroin addiction, but it still can't make you unfuck a Nazi. I think that's even one of the lesser known tenets of Alcoholics Anonymous.