Diana Ross knows how to throw a party! On Tuesday, the legendary singer celebrated her 75th birthday in style by hosting a huge bash at the Hollywood club Warwick before taking things to the Hollywood Palladium. The party brought out stars like the Kardashians, Sean "Diddy" Combs, DJ Khaled, Stevie Wonder, Gayle King, and, of course, Diana's famous family. Beyoncé even serenaded Diana with an impromptu performance of "happy birthday." From the incredible outfits to all the behind-the-scenes glimpses guests posted on social media, we have to admit that we're getting some serious FOMO. Take a peek inside the glamorous party ahead!