 The Onyx Hotel Tour to promote In the Zone was the fourth concert tour by Britney Spears. 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 phrase 'in the zone'. 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 highly promoted the tour on TV shows and the network's website. The tour was divided into seven segments: Check-In, Mystic Lounge, Mystic Garden, The Onyx Zone, Security Cameras, Club and the encore. Check-In displayed performances with dance and advanced in the hotel theme. Mystic Lounge featured an homage to Cabaret and other musicals, while remixing some of Spears's early hits. Mystic Garden displayed a jungle-inspired stage. The Onyx Zone displayed a ballad performance with acrobats. Security Cameras was the raciest part of the show, with Spears and her dancers emulating different sexual practices. Club displayed a performance with urban influences. The encore consisted of a system malfunction interlude and Spears performed wearing a red ensemble. The tour received mixed reviews from contemporary critics, who praised it for being an entertaining show while criticizing it for looking "more [like] a spectacle than an actual concert". The Onyx Hotel Tour was commercially successful, grossing $ 34 million. In March, Spears suffered a knee injury onstage which forced her to reschedule two shows. In June, Spears fell and hurt her knee again during a music video shoot. She underwent surgery and the remainder of the tour was cancelled.
