Christina Aguilera—an American singer, songwriter, actress, and television personality—has been active in the music industry since the 1990s. Known for her powerful four-octave vocal range and melismatic singing style, she has been hailed as the "Voice of a Generation." Aguilera has been a trailblazer for pop artists, addressing controversial themes like feminism, sexuality, and LGBT culture in her music. Her debut album in 1999 launched her to fame with hit singles such as Genie in a Bottle and What a Girl Wants. Throughout her career, she has released successful albums like Stripped and Back to Basics, and her notable songs include Beautiful, Ain't No Other Man, and Hurt. Aguilera has received numerous awards, including five Grammy Awards, and she is considered one of the best-selling music artists of all time, with over 100 million records sold worldwide.