Madonna sings Hey You on Live Earth

Pop queen Madonna got 70,000 people on their feet demanding action on climate change in a stunning finale to the London leg of Live Earth.

“If you want to save the planet I want you to start jumping up and down,” she told the packed Wembley Stadium. “Come on mother f***ers, if you want to save the planet let me see you jump.”

Dozens of school children in school uniform sang along to Hey You, while footage showed images including polluting factories.