Jenna Jameson has told two completely different -- and contradicting -- stories about the incident that led to the arrest of her baby daddy Tito Ortiz yesterday ... and they're both caught on tape.
When we first saw Jenna last night -- around 8 PM -- she adamantly stated that Tito did not beat her up.
But a few hours later -- around 10 PM -- the story had changed ... and Jenna repeatedly referred to Tito as a "wife beater."
So what happened in the time span between her stories? Well, one minor thing -- around 9:30 PM -- Tito held a press conference in which the fighter claims he never touched her ... and insinuated that Jenna's injuries were the result of her alleged addiction to OxyContin.