No, Beyoncé was not pregnant during Coachella in 2018. In the past, she has performed while pregnant, but that's not the reason her Coachella set made such an impression on fans and critics.A bit of background: In 2017, Beyoncé was announced as one of Coachella's headliners, but she postponed her set for a year. At the time, she was pregnant with twins (Rumi and Suri, born on June 13, 2017, about two months after the music festival).It wasn't an easy pregnancy."I was 218 pounds the day I gave birth to Rumi and Sir," the singer wrote in Vogue. "I was swollen from toxemia and had been on bed rest for over a month. My health and my babies' health were in danger, so I had an emergency C-section. We spent many weeks in the NICU. My husband was a soldier and such a strong support system for me. I am proud to have been a witness to his strength and evolution as a man, a best friend, and a father. I was in survival mode and did not grasp it all until months later. Today I have a connection to any parent who has been through such an experience."But a mere six months after giving birth, Beyoncé began preparing for her 2018 Coachella set. That meant losing weight."During my recovery, I gave myself self-love and self-care, and I embraced being curvier," she wrote. "I accepted what my body wanted to be. After six months, I started preparing for Coachella. I became vegan temporarily, gave up coffee, alcohol, and all fruit drinks. But I was patient with myself and enjoyed my fuller curves. My kids and husband did, too.""I put pressure on myself to lose all the baby weight in three months, and scheduled a small tour to assure I would do it," she wrote. "Looking back, that was crazy."When the singer hit the stage at Coachella, expectations were high. Beyoncé is, of course, one of the world's most successful pop stars, and in recent years, she's become a prominent activist, promoting feminism, Black Lives Matter, and other causes through her music. She was also the first woman of color to headline the festival, and fans were very aware that she'd recently given birth to twins.Per most critics and music fans, her two-hour set didn't disappoint. Guest appearances from Beyoncé's husband, Jay-Z, and sister Solange were clear highlights, but the Coachella crowd was awestruck when the singer reunited her old group, Destiny's Child, for a three-song mini-set. A marching band provided accompaniment for Queen Bey's 2003 hit, "Crazy in Love," and quotes from Chimamanda Ngozi Adichie, Malcolm X, and other black activists added cultural context to the performances."It was rich with history, potently political and visually grand," Jon Caramanica of The New York Times wrote of the set. "By turns uproarious, rowdy, and lush. A gobsmacking marvel of choreography and musical direction."In total, Beyoncé's Coachella set featured about 100 singers, dancers, and musicians, many of whom appeared on a giant pyramid stage (the stage, by the way, was displayed at 2019 Coachella). Footage from the performance appears in Homecoming, a Netflix concert film / documentary.Ultimately, Beyoncé's Coachella--which her fans quickly termed "Beychella"--was one of the most rousing and important performances in the festival's history. She wasn't pregnant at the time, but her pregnancy certainly played an important role.'