Around 6:40 p.m., trailed by a female pal and Laguna Beach's Stephen Coletti, Hilton made her way to the outdoor tented green room at Universal Studios' Gibson Amphitheater.
Clutching her black Chanel purse, the heiress and her friend made a beeline for the buffet table, not pausing to greet fellow guests before sampling everything from mini egg salad sandwiches to caprese salad on toast and carrots.
Within seconds, people in the green room had swarmed around her, with MTV staffers snapping pictures on their camera phones and the few photographers allowed backstage jostling for a good view.
After five minutes of noshing, Hilton wiped her mouth and tossed her napkin onto the buffet table. Though she was quiet, she seemed to be in good spirits, smiling and posing and apparently unfazed by the commotion surrounding her.
But her mood changed briefly when Three 6 Mafia's DJ Paul approached and gave her a hug, telling her how sorry he was about everything that was going on. Hilton shook her head, repeating, "I know, I know. Yup."
After she was booked later that night at the Century Regional Detention Facility in Lynwood, Calif., she given her first meal as an inmate, the Associated Press reports: cereal, bread and juice.