Christina Aguilera served a Y2K flashback while enjoying a fun-filled night out in San Francisco. I love seeing it, and I love seeing people dress as the ‘Dirrty’ outfits with the chaps [on Halloween], and all of it, the black and blonde hair,” she gushed. “I love seeing people reinvent and have fun with different creative free choices I’ve made.”Related: Christina Aguilera’s Sexiest Style Moments Through the Years Christina Aguilera has left her mark in the fashion world. Related: Christina Aguilera Goes Pantsless in Sparkly Leotard in Mexico Medios y Media/Getty Images Christina Aguilera is still killing it. Aguilera, 43, took to Instagram on Sunday, May 19, to show off the sexy stage look she wore during the 2024 Tecate Emblema music festival.