There's been a "sensational demand" for tickets to the star's upcoming shows
The singer was set to direct the film herself
Tickets for 'The Celebration Tour' went on sale this morning
"Trying to secure Madonna tickets feels like an Olympic sport"
The tour will look back at the icon’s four decades in music
"She’s become the most grotesque, trainwreck embarrassment in the history of world entertainment"
In the video, Amy Schumer dares Madonna to do a greatest hits tour
Christina Aguilera had to take Lopez's place due to scheduling conflicts
Tickets go on sale this week
"There is a special link between you and our city"