Spencer was there with faux wife Heidi Montag, who said she's releasing a new album soon and using actual professionals to shoot the videos instead of her boyfriend. But as soon as the two finished interviews on the carpet, they left the party.
Of course, not before Spencer had a chance to sound off on L.C.'s upcoming departure from The Hills.
The reality-TV troublemaker says he's really going to miss Conrad: "I'm actually very depressed," he told me of her departure. "Who am I gonna beef out with? I gotta find some new enemy on the show."
So how did Lauren and BFF Lo Bosworth avoid this awkward run-in?
They skipped the carpet altogether and hung out inside at their own VIP table as Lady Gaga played. Stephanie Pratt apparently felt no family loyalty, as she headed to their table and sat with the girls.
But that didn't discourage the Keeping Up With the Kardashians star—Kourtney also made it to the party, she just rolled solo.