2013 Oscars: Orlando Bloom, Miranda Kerr, Emmy Rossum and More Hit Global Green Party

Most of Hollywood has Oscar gold on their minds this week, but last night, stars were going green!

Eco-friendly celebs like Orlando Bloom, Miranda Kerr and Emmy Rossum hit the Avalon in Hollywood for Global Green USA's 10th Annual Pre-Oscar Party.

So what went down at the big awards season bash?

PDA: Cute couple Bloom and Kerr weren't shy about getting cheeky on the red carpet before the event. The 29-year-old model was snapped grabbing her hubby's butt while flashing a giant smile before heading inside to spend the rest of the night at each others' sides.

Date Night: While Rossum didn't get handsy with her man, she and her Shameless beau Tyler Jacob Moore were cozy together at their table during the party.

Top Chef: Celeb guests, like Ed O'Neill, Helen Hunt, Dylan McDermott, Sophia Bush and Josh Radnor, enjoyed food by Chef Akasha Richmond of Akasha Restaurant in Culver City.

Emmy's Oscar Pick: Rossum dished to us about her favorite movie of the year. "Beasts of the Southern Wild. It was just touching. Very un-Hollywood, very unexpected. I think the director is very talented."

Music: Willie Nelson was the night's headlining performer. The music legend performed a collection of his songs, including his famous "On the Road Again." (Fun fact: before his performance, Nelson was overheard saying he was a little unsure of what he'd be playing for the crowd).