Madonna performs in concert during her "Sticky and Sweet" tour at Madison Square Garden

Madonna performs in concert during her "Sticky and Sweet" tour at Madison Square Garden in New York, Monday, Oct. 6, 2008.

Madonna appears on stage seated in a giant chair at the opening of her "Sticky and Sweet" tour at Madison Square Garden in New York, Monday, Oct. 6, 2008.

Madonna performs in concert during her "Sticky and Sweet" tour at Madison Square Garden in New York, Monday, Oct. 6, 2008.

Madonna appears on stage seated in a giant chair at the opening of her "Sticky and Sweet" tour at Madison Square Garden in New York, Monday, Oct. 6, 2008. (AP Photo/Kathy Will

Madonna , center, performs in concert during her "Sticky and Sweet" tour at Madison Square Garden in New York, Monday, Oct. 6, 2008.