Lauren and Heidi: No Longer BFFs

"Lauren and Heidi are no longer friends," a Hills source says. "They never talk or hang out. Spencer achieved his goal and broke them apart."

The feud heated up even more Monday night. Sources snitch that Montag declined MTV's invitation to attend The Hills: Finale After Party filmed before a live studio audience at MTV Studios in NYC last night. During the broadcast, when host Susie Castillo asked Conrad how her friendship is with Heidi these days, she replied bluntly, “It’s definitely different.”

So why did Heidi decline to join fellow Hills stars Conrad, Audrina, and Whitney at the after party show?

A source tells Usmagazine.com that she opted to stay back in Los Angeles with Pratt, who was not invited. "Heidi was offended they wouldn't invite Spencer." But Lauren hasn't completely ruled out a reconciliation with her former BFF.

When Usmagazine.com recently asked Conrad whether she and Heidi could be friends again if she breaks up with Spencer, Conrad answered, "Of course, I love Heidi. I was in a similar situation with her last year when I moved out with my boyfriend [Jason Wahler]. Heidi and I barely talked, but as soon as we broke up, she was there for me, and it only made our friendship stronger."

Meanwhile, Pratt and Montag are still shacking up in a Hollywood apartment. "We're going to take over the world," Pratt recently told Usmagazine.com. "Heidi is the biggest star from that show."

Source