Madonna - pictured looking a little younger - has been warned that a stadium she is to perform in is unsuitable for a large concert audience.
The singer is due to perform at the Luzhniki Stadium in Moscow on Tuesday (September 12), an 85,000 capacity venue that was used for the 1980 Olympics. But the stadium's designer, Nodar Kancheli, has said that it's unsuitable for such an event.
"The stadium could collapse if audio frequency resonates with the vibration frequency of the building," he said. "The sound waves could damage the structure."
Kancheli added that tens of thousands of attendees could be in danger. He speaks from experience, too: he designed the Transvaal Water Park Stadium, also in Russia, which collapsed in similar circumstances in 2004, killing 28 people.