[5] In 1987 she performed on the worldwide Who's That Girl World Tour, which visited Europe, North America and Japan, and earned $25 million.

[8][9] In 1990, she embarked on the Blond Ambition World Tour, which was dubbed the "Greatest Concert of the 1990s" by Rolling Stone.

[7] A review in Time by Sam Buckley said: "Madonna, once the Harlow harlot and now a perky harlequin, is the greatest show-off on earth.

[7] She grossed more than US$75 million with summer sold-out shows and eventually played in front of 730,000 people throughout North America and Europe.

Madonna was inspired to create the tour after taking part in an art installation called X-STaTIC PRo=CeSS, directed by photographer Steven Klein.

[21] During the London stop of her 2006 Confessions Tour, Madonna became the first performer to be inducted into the Wembley Arena Square of Fame.