From the Wikipedia:

Adrienne Elisa Bailon (born October 24, 1983) is an American actress and member of the singing groups 3LW with Kiely Williams and Jessica Benson and The Cheetah Girls with Kiely Williams and Sabrina Bryan.

Bailon’s major break came in 1999, when she sang with her church at Madison Square Garden. Bailon was one of the four singers chosen from the choir to sing backup for Ricky Martin during his concert that night. She was then asked to join the R&B group 3LW, along with Naturi Naughton and Kiely Williams, and the group’s self-titled debut album, released in 2000, was certified platinum.

She was later cast as Chanel in the Disney Channel Original Movie, The Cheetah Girls , which spawned a multi-platinum soundtrack and an even more popular sequel with accompanying soundtrack. Kiely Williams of 3LW was also cast as Aqua in the movie. The film became such a success, Bailon, along with fellow cast members Kiely Williams and Sabrina Bryan became their own girl group, The Cheetah Girls. In 2005 the girls released their debut holiday album Cheetah-licious Christmas. They went on tour to promote the Christmas album and to simultaneously promote the movie. After the release of the Disney Channel Original Movie, The Cheetah Girls 2, the girls hit the road again, on their The Party’s Just Begun Tour, to promote the sequel’s soundtrack. During the tour The Cheetah Girls also confirmed that they plan to record and release their new album (first official non-holiday album) in the summer of 2007.