EXCLUSIVE: Heidi Fleiss Booted From Celebrity Rehab For One Night After Battle With Tom Sizemore

Take two ex-lovers with drug problems and charges of abuse, throw them in the same house and what do you get? Ka-BOOM! An explosion that rivals a meth lab blowing up!

Heidi Fleiss and Tom Sizemore engaged in a verbal battle so brutal while taping VH-1's Celebrity Rehab Presents Sober House with Dr. Drew that the doc had to rush back to the house and restore order by having Heidi leave for a night, RadarOnline.com has learned exclusively.

The show, in its third season, is currently taping but won't air for months. Fleiss and Sizemore once dated, which ended with her accusing him of physical abuse.

Now, living in the same house trying to stay clean they have been battling viciously, RadarOnline.com learned. During a group session this past week Heidi attacked Tom verbally. "She said horrible things about him being a loser and wife beater," a source told RadarOnline.com. A few weeks ago she had went after him and he flipped out.

This past week, as Heidi went on the attack the tension exploded. "They both stood up like it was an episode of Gunsmoke and had a stare off," the source told RadarOnline.com. "Then the insults got nastier and nastier."

Dr. Drew was called by the staff, we hear, and rushed back to the scene to restore peace. Heidi was sent packing for one night and went to her sister's place.

Think things will improve? One source tells RadarOnline.com that Heidi has no intention of letting up on Tom.

And another source tells RadarOnline.com that Tom is fuming because Heidi used a racist term to describe Tom's girlfriend, who is black.

Geez people can't we all get along? Hugs, not drugs, that's our advice. But of course we can't wait to see every minute of this when

it finally airs!

(Photo: WENN)