Katy Perry was the belle of ball at the Gridlock New Year’s Eve party in Hollywood.
This year’s pop princess newcomer performed for about 5,000 people on the Paramount lot.
After leading the countdown to '09, she shouted, "Happy f--king New Year, everyone!" and continued into a performance of her latest hit, "Hot N Cold." She then dedicated her tune, “Waking Up in Vegas,” to—who else?—partiers in Sin City.
Of course she sang “I Kissed a Girl.” “Has everyone kissed someone yet?” she asked, before launching into her debut hit single.
Perry wasn't the only happening in Hollywood...