Tarek El Moussa and his ex-wife, Christina Haack, had a nasty fight on the set of "Flip or Flop" this week… a fight so bad that the duo had to film their scenes separately.

TMZ said the fight began with Christina signaling to her ex that she was ready to begin filming. Tarek supposedly lost it and began ripping Christina, claiming that she's a "washed-up loser."
During the tirade, Tarek began comparing Christina to his fiancee, Heather Rae Young, claiming the latter is "hotter and richer than Christina," TMZ said. Tarek even supposedly claimed that he "made" Christina.
"Look at me, look at me, look at me. It's called winning," he reportedly said. "The world knows you're crazy!"
A source told the webloid that Tarek's been incredibly angry with his ex ever since she recently admitted to smoking toad venom before meeting her new boyfriend Joshua Hall. Tarek believes Christina's decision was reckless, considering they have two children.

The behind-the-scenes blowout isn't new. In fact, sources say this has happened before. As result of the latest fight, production stopped filming Tarek and Christina together for the rest of the day.
Although the fight was volatile, it's also much ado about nothing, given that Tarek and Christina are both executives of "Flip or Flop."
"There's going to be tension from time to time," the report says.