Paris Hilton performed her first-ever concert performance in Los Angeles, where the heiress was joined on stage by Saweetie and Kim Petras. Some of the A-list names who came out to support the reality star's big night include Dylan Mulvaney, Elle Fanning, Ashlee Simpson and her famous parents, Kathy and Rick Hilton. According to Paris, the event kicks off the 'Summer of Sliving.' Source