The Onyx Hotel Tour was the fifth concert tour by American entertainer Britney Spears. It showcased her fourth studio album, In the Zone (2003), and visited North America and Europe. A tour to promote the album was announced in December 2003. Its original name was the In the Zone Tour, but Spears was sued for trademark infringement and banned from using the name. Spears felt inspired to create a show with a hotel theme which she later mixed with the concept of an onyx stone. The stage, inspired by Broadway musicals, was less elaborate than her previous tours. The setlist was composed mostly by songs from In the Zone as well as some of her past songs reworked with different elements of jazz, blues, and Latin percussion. Tour promoter Clear Channel Entertainment marketed the tour to a more adult audience than her previous shows, while sponsor MTV promoted the tour heavily on TV shows and the network's website.

Britney Jean Spears is an American singer. Often referred to as the "Princess of Pop", she is credited with influencing the revival of teen pop during the late 1990s and early 2000s. Spears has sold over 150 million records worldwide, making her one of the world's best-selling music artists. She has earned numerous awards and accolades, including a Grammy Award, 15 Guinness world records, six MTV Video Music Awards, seven Billboard Music Awards, the inaugural Radio Disney Icon Award, and a star on the Hollywood Walk of Fame. Her heavily choreographed music videos earned her the Michael Jackson Video Vanguard Award.