Christina may refer to:

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Christina María Aguilera (born December 18, 1980) is an American recording artist and actress. Aguilera first appeared on national television in 1990 as a contestant on the Star Search program, and went on to star in Disney Channel's television series The Mickey Mouse Club from 1993 to 1994. Aguilera signed to RCA Records after recording "Reflection", the theme song for the animated film Mulan (1998).

In 1999, Aguilera came to prominence following her debut album Christina Aguilera, which was a commercial success spawning three number one singles on the Billboard Hot 100—"Genie in a Bottle", "What a Girl Wants", and "Come On Over Baby (All I Want Is You)." Her sophomore and her debut Latin-pop album, Mi Reflejo (2000), a Christmas third studio album, My Kind of Christmas (2000), and several collaborations followed which garnered Aguilera worldwide success, though she was displeased with her lack of input in her music and image. After parting from her management, Aguilera took creative control over her fourth studio album, Stripped (2002). The album's second single, "Beautiful", was a commercial success and helped the album's commercial performance amidst controversy over Aguilera's image. Aguilera followed up Stripped with the soul, jazz and blues inspired, Back to Basics (2006), released to positive critical acclaim. The album produced three singles "Ain't No Other Man", "Hurt" and "Candyman". Four years later Aguilera released her sixth studio album, Bionic (2010), which incorporated aspects of R&B, electropop, and synthpop and was met with mixed reviews and low sales. Aguilera's seventh studio album is set to be released in 2012.

Christina Judith Perri (born August 19, 1986) is an American singer-songwriter and musician from Philadelphia. Her song "Jar of Hearts" charted in the United States after it was featured on the Fox television show So You Think You Can Dance in 2010. Rolling Stone named her the "Band of the Week" on October 26, 2010. On May 10, 2011, Perri's "Jar of Hearts" was featured on Glee (Season 2, Episode 20 "Prom Queen"). Also, on June 27, 2011, Perri's "Jar of Hearts" was featured on Switched at Birth (Season 1, Episode 4 "Dance Amongst Daggers"). One of her songs, "A Thousand Years", has been in the Twilight saga movie Breaking Dawn.

Perri grew up in Bensalem, Pennsylvania (a suburb of Philadelphia) with her older brother, Nick Perri, who formerly played guitar with Shinedown, Silvertide, Perry Farrell and Matt Sorum. Her father is from Italy. She attended Archbishop Ryan High School as a member of the class of 2004. She taught herself how to play guitar as a 16-year-old by watching a videotape of Shannon Hoon from the group Blind Melon performing on VH1.

Christina Victoria Grimmie (born March 12, 1994), known on YouTube as zeldaxlove64, is a pianist and singer/songwriter known for her covers of hit songs by artists such as Demi Lovato, Selena Gomez, Christina Aguilera, Miley Cyrus, Justin Bieber, Katy Perry and many more. In June 2011, she released her debut EP, Find Me.

Christina Grimmie is best known for her cover with fellow Youtuber, Sam Tsui, of Nelly's "Just a Dream" which has had about 60 million views between the two official versions of the video as of May 15, 2012. Her first video was "I Don't Wanna Be Torn", originally by Hannah Montana. She first reached YouTube stardom early on with her cover of Miley Cyrus's "Party in the U.S.A." on August 2009. Since, she's had over 289 million views and over 1.5 million subscribers on her channel as of May 15, 2012, which has made her the 4th most subscribed musician on YouTube. She also placed at number 2 at the top 5 of the MyYoutube competition, behind Selena Gomez, and in front of Rihanna, Nicki Minaj and Justin Bieber.

Adam Noah Levine (born March 18, 1979) is an American singer-songwriter and musician, best known as the front man and guitarist for the pop rock band Maroon 5. He is also a coach on the American talent show The Voice.

Levine was born in Los Angeles to Fred and Patsy (née Noah) Levine. His uncle is journalist and author Timothy Noah. He has a brother, Michael, and a sister, Julia. When he was six years old, he made the winning shot of his local YMCA championship basketball game (on a team his father coached) with no time left on the clock. He has said that the incident changed his life and gave him the confidence to be successful.

Levine attended French Woods Festival of the Performing Arts Camp (Hancock, NY) with best friend Jesse Carmichael, guitar player of the band known at that time as Kara's Flowers. He graduated from Brentwood School in 1997.

Levine has Jewish ancestry on both sides of his family (his father and maternal grandfather were Jewish), and considers himself Jewish, though according to The Jewish Chronicle, who interviewed Levine, he "has rejected formal religious practice for a more generalized, spiritual way of life". He chose not to have a Bar Mitzvah as a child.