Just think, it was only one year ago that Justin Bieber and Selena Gomez were seen holding hands at the Vanity Fair Oscar Party together, confirming speculation that they were actually a couple. Last night, Bieber didn't make it to the annual Vanity Fair shindig in Hollywood, but that didn't stop Gomez from hitting the red carpet at the event.

Gomez looked stunning in a tight-fitting white Dolce & Gabbana gown. Without her boyfriend at her side, Gomez's "date" this year was her mom, Mandy Teefey. Tom Cruise, Kate Hudson and Jennifer Lopez were reportedly in attendance as well.

Gomez even tweeted a photo of herself at the event with actress Lily Collins, the daughter of Oscar-winning singer Phil Collins. "Yep. Classy gals chillen at the Vanity Fair Oscar party," Gomez wrote.

Bieber's absence isn't a sign of any trouble between the teen stars. In fact, Gomez has been wearing a ring he gave her -- not an engagement ring, but what she calls "a friendship ring." Bieber did, however, make an appearance on the Oscars broadcast in a pre-taped comedic segment with host Billy Crystal.