Rumor: Rob and Kristen Attend A Pre-Oscar Party

USMag The big destination one night earlier: Chateau Marmont in Hollywood. On hand for that dance-heavy bash, where DJ Jesse Marco spun tunes for the crowd: single gal Scarlett Johansson, newsmaking teen Miley Cyrus, Mila Kunis, mom-to-be Natalie Portman, Halle Berry and love Oliver Martinez, Ryan Gosling, Rob Pattinson, Kristen Stewart . . and James Franco, co-host (and Best Actor nominee) at Sunday's big night Robert Pattinson and Kristen Stewart threw their hands in the air like they didn't care all night long at a Friday/Saturday pre-Oscar bash at the Chateau Marmont in Hollywood.

The costars and real-life loves "were dancing the whole time," a fellow reveler tells "They definitely kissed a few times." (Stewart wore a black dress for the bash.)

Pattinson, 24, and Stewart, 20, were far from the only celebs getting their dance on to DJ Jesse Marco's mix of 80s, classic hip hop and pop: Hayden Panettiere and Miley Cyrus (dancing to her own "Party in the USA"!) were spotted on the dance floor, whcih was also flooded with stunning models. Stars like Scarlett Johansson, Halle Berry, Ryan Gosling and Natalie Portman also stopped by.

The highlight for Pattinson and Stewart? When a certain Jay-Z/Alicia Keys Big Apple classic came on around 1 a.m. "They went nuts for Empire State of Mind!" the witness tells Us.

gossip_dance and jojo_9030

Another LA sighting? lol Rob and Kristen may really be 'jumpers' after all. If were lucky, we may have pics one year later... haha