from Madonna.com :
Dear Madonna fans,
The Material Girl has embarked on her “Sticky & Sweet” Tour and is currently performing live in several European cities. While thousands of you attend the show each and every night, our girl is giving her best to each and everyone of you.
Singing and dancing along with her is a fantastic way to support her, but there’s a little something some of you can do to turn the experience into the ultimate one. If you’re watching the show from the first front rows, we ask that you please refrain from smoking as it blows up on the stage.
Thank you for your understanding, we appreciate your help!