The Hills star Lauren Conrad arrives at LAX airport to catch a flight on Thursday.

On the Late Show with David Letterman, Heidi Montag was not optimistic about her relationship and feud with Lauren Conrad. When asked if they could be friends, Heidi responded, “I don’t think so. After blaming a sex tape on me and making a whole season about it… I am not so sure.”

Barack Obama however, was much more optimistic on his visit to the Late Show. “My first act as President will be to stop the fighting between Lauren and Heidi on The Hills,” he read as part of his Top Ten “Surprising Facts” about himself.

Source: Just Jared

Lauren tries to uphold her friendship to Audrina, but is it already too late? Meanwhile Spencer tries to win Heidi back and risks her career to do so.

SEASON FINALE!!!