Paris Shafts Britney, Take II

These friendships simply aren't built to last.

First, Britney Spears was barred from appearing in an NFL Super Bowl ad because organizers had already secured Paris Hilton for the spot.

Now the crazy commando clubber has been kicked off the invite list to the Vienna Opera Ball in favor of her former BFF, MSNBC's The Scoop reports today.

Originally the horrible hotel heiress was scheduled to attend the event - the highlight of Austria's social season - with Spears, since they were such good friends and all. But after the pair had a falling out and broke up, an event that no one on Earth saw coming, one of the crotch shot queens had to be yanked.

After much deliberation (from people who somehow don't have better things to worry about), it was Mrs. Kevin Federline who was taken off the invite list.

Hilton is reportedly receiving $1 million for attending, and is the personal guest of wealthy industrialist Richard Lugner, 74, and his socialite wife Christina.

"She is a very good advertisement for the Opera Ball," Richard Lugner explained.

THG NOTE: We assume Courtney Love had a prior engagement.

And why was Britney Spears disinvited?

Christina offered: "They unfortunately do not get along anymore."

What will Britney be doing instead?

We have no idea. But we're sure it involves a lot of clubbing, a healthy dose of Isaac Cohen and absolutely no pictures of Jayden James.