"The reports are totally untrue," the source says, denying that Lohan and Warren got amorous at Villa on Nov. 19 as some online sites have reported. "They never hooked up."
True, the two know each other "professionally," the source says, "[but] they are friendly – that's it."
As for Alba and Warren, "the rumors are hurtful but they're just so ridiculous," the source says. "They are very happy together and busy being parents. They're looking forward to spending the holidays together with family."
Reps for Lohan and Warren could not be reached for comment.