The tour was supposed to start Process_start in 1999 , but was delayed Change_event_time until 2001 as Madonna gave Giving birth Presence to her son , got married Forming_relationships to Guy Ritchie , was working on `` Music '' , and was busy filming Create_artwork `` The Next Best Thing '' .

The length of the tour was due to the chart-topping success of `` I Do n't Want to Miss a Thing '' .