Christina María Aguilera (born December 18, 1980) is an American singer, songwriter, actress, and television personality. Born in Staten Island, New York and raised in Rochester and Wexford, Pennsylvania, she appeared on the television series Star Search and The Mickey Mouse Club in her early years. After recording "Reflection", the theme for Disney's 1998 film Mulan, Aguilera signed with RCA Records.

Aguilera has earned two number-one albums on the US Billboard 200 with her self-titled debut album in 1999 and Back to Basics in 2006. Her albums Stripped (2002), Bionic (2010), Lotus (2012), and Liberation (2018) debuted in the top-ten in the United States. Further, her Spanish-language album Mi Reflejo and the holiday album My Kind of Christmas each topped Billboard component charts in 2001. Several of Aguilera's songs have experienced international success, including "Genie in a Bottle", "What a Girl Wants", and "Come On Over Baby (All I Want Is You)" from her self-titled debut which each topped the Billboard Hot 100, "Dirrty", "Beautiful", and "Fighter" from Stripped, "Ain't No Other Man" and "Hurt" from Back to Basics, and the collaborations "Lady Marmalade", "Moves like Jagger", "Feel This Moment", and "Say Something". Beyond her music career, Aguilera starred in the film Burlesque (2010) and has been featured as a coach on six seasons of the reality competition television series The Voice since 2011.

Aguilera has been recognized as a pop icon and earned the title "Pop Princess" in her early years. Her work has earned her five Grammy Awards, one Latin Grammy Award, and a star on the Hollywood Walk of Fame. Throughout her career, she has sold more than 50 million records worldwide. In 2009, she ranked at number 58 on Rolling Stone's list of 100 Greatest Singers of All Time, thereby becoming the youngest and the only artist under 30 to be named. Billboard recognized her as the 20th most successful artist of the 2000s, and Time listed Aguilera among the top 100 Most Influential People in the World of 2013. Aside from her work in the entertainment industry, Aguilera is involved in charitable activities through human rights, world issues, and her work as a UN ambassador for the World Food Programme.