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She was a member of The Mickey Mouse Club, along with Britney Spears and Justin Timberlake. When she was 17, she sang on the soundtrack of the Disney movie Mulan.
Among the backstage demands at her concerts: 4 candles, a tray of organic vegetables, chocolate Nesquik, and a bottle of Flintstones vitamins.
She won the 1999 Grammy for Best New Artist, beating Britney Spears.
In between albums, Christina completely changed her image. She began "doing her own thing," adding a lot more hip hop and a lot less pop. Her hairstyle changed, and she even managed to change her voice to sound more like a rapper. (thanks, Maria - Atlanta, GA)
She married music marketer Jordan Bratman in November, 2005. They met when he was working at her record label. Christina opted to donate the majority of her wedding gifts to charities supporting victims of Hurricane Katrina.
She filed for divorce from Bratman on October 14, 2010 and it was finalized on April 15, 2011. (thanks, Jordan - Newcastle, Australia, for above 2)
Christina gave birth to her son, Max Liron Bratman, in Los Angeles on January 12, 2008. Bratman is of Jewish descent, so the baby was circumcised in accordance with Jewish practice.
Christina is half-Ecuadoria, because of her soldier father, Fausto Wagner Xavier Aguilera. Her parents divorced when she was six and she was raised by her Spanish teacher mom Shelly.
She recorded an entirely Spanish-language album Mi Reflejo, which won the Latin Grammy Award for Best Female Pop Vocal Album in 2001.
Christina made her national television debut at the age of nine on Star Search singing "A Sunday Kind of Love." She finished runner-up in the competition.
She has a number of tattoos, including "Xtina" on the back of her neck, a Hebrew psalm lyric ("I am my beloved's and my beloved is mine") on her lower back and "Te Amo Siempre" ("I love you, always") on her left elbow.
Aguilera had a cameo part in the animated DreamWorks movie Shark Tale voicing a jellyfish named Christina
Christina became the global spokesperson for World Hunger Relief in 2009, featuring in advertisements, online campaigns and a public service announcement.