That’s precisely what happened over the weekend outside Los Angeles. Aud packed up a gaggle of gal pals and headed to the grand opening of Galpin Auto Sports where a rock-packed lineup of performers rang in the custom-auto joint.

Performances alongside Ozzy included Dave Navarro, Macy Gray, Slash, Cypress Hill and Xhibit, but Lauren Conrad‘s former roomie only cared about Sharon‘s husband.

“Audrina pushed her way front and center to see the performances,” a source tells Celebuzz. “Ozzy came out and she was so excited.  He touched her hand during one of his songs, and she raved about it for hours.”

Will she ever wash it again?

“She’s a total rock girl,” our source reassures. No wonder she has that tendency for the edgier boys.

Crowds packed the massive performance space and next door’s new hot spot Bardot to catch DJ sets by Steve Aoki, Danny Masterson, Shwayze (that counts Cisco Adler as one half of the colorful duo) and Mark Ronson.

Ronson, who ditched his fancier duds from the night before, rocked a red hoodie and square-framed glasses. Samantha‘s brother spun old school hits and even gave Britney Spears a shout out by remixing her hit, “Toxic.”

“Let’s hear if for DJ AM, the reason we’re all fucking here tonight,” Ronson told the audience.

That was certainly true of the vibe onstage. Celebuzz had an exclusive eye on the partying pals of Goldstein and fellow survivor Travis Barker (who was unable to attend due to recovery).

They included a bubbly Hilary Duff (enamored in conversation with Danny Masterson), a roving Macy Gray in a knit gray cap, nightlife kingpin Brent Bolthouse and the Black Eyed Peas‘ Will.I.Am.

The man of the hour, AM himself, arrived around 10:30 p.m., and hung in for a good few hours (despite the big gig in front of him tonight). While he didn’t spin, he certainly accomodated his fellow jockeys.

“AM was in great spirits,” the on-stage onlooker said. “He was constantly shuffling things around on the table, clearing wires, giving feedback, it was amazing. He was just getting back into the swing of things.”

Around 1:30 a.m. Goldstein, clad in jeans, a hoodie and a blinged out necklace, let out a yawn and was swept away by his publicist and two male pals.

Today he rests, as tonight he plays house DJ for Jay-Z, when the pair will help Live Nation reopen Hollywood landmark The Palladium.