Diana Ross knows how to throw a party! On Tuesday, the legendary singer [1] 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 [2]" Combs, DJ Khalid, Stevie Wonder, Gayle King, and, of course, Diana's famous family [3]. Beyoncé even serenaded Diana with an impromptu performance of "happy birthday [4]." 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!