The tour was described as a "rock driven dancetastic journey". It was divided into four acts: "Pimp", where S&amp;M was the main theme; "Retro", where Madonna's classic songs were performed while displaying work of deceased artist Keith Haring; "Gypsy", a fusion of Romani folk music and dance with the performances ranging from melancholic to joyous; and "Rave", where high-energy uptempo songs were performed. The last section of the show included a special 'request song', to which the audience was invited to sing-along. Some changes were made to the set list during the second European leg of the tour in 2009, including a dance tribute to deceased singer Michael Jackson.