Party Hopping with Brad & Angelina!

At Paramount's Golden Globes bash held at Hollywood's Chateau Marmont on Jan. 10, Brad Pitt and Angelina Jolie proved they aren't above improvising. Arriving shortly after 8 p.m., the pair made the rounds through the hotel's private courtyard, greeting fellow party guests Leonardo DiCaprio and Robert Downey Jr.

"Brad was really happy — totally being his mellow, low-key self," a fellow party goer tells OK!. "People kept coming up to him, trying to talk business, and Brad was like, 'Nah, man. Not now. This is a party.'"

Drinking a Heineken beer out of a bottle, Pitt chatted with party host Brad Grey, who invited him and Angie to join him in the courtyard's VIP section. But getting there proved more difficult than the parents of six anticipated!

"Brad Grey motioned for Brad and Angelina to cut through some hedges to get to the VIP," the insider tells OK!. "Brad was game but Angelina looked a little tentative — she was after all, wearing heels and a nice dress!"

But, outnumbered as she was, Angie eventually gave in and followed Pitt and Grey through the bushes.

"Brad had his Heineken in one hand, and Angelina's hand in his other and said, 'C'mon babe — you can do this!'" the source tells OK!. "And he led her through the hedges to the VIP. It wasn't like Angelina was worried about ruining her dress, she just had a look on her face like, 'Are we supposed to be doing this?'"

The next night, following the awards ceremony, Brad and Angie joined most of Hollywood's A-listers at the Sunset Tower Hotel, where onlookers tells OK! the pair stole the show, sneaking some very public smooches.

"She'd give him a kiss, he'd caress her back. There was a lot of PDA going on," an eyewitness tells OK!. "Neither one of them looked too upset about not winning — they spent the whole evening exchanging loving looks and holding hands. It was really cute!"

At 10 p.m., the couple finally took a time-out from their nuzzling to share a chocolate molten cake.

Ah, amore!