Meat Loaf played the ugly American when he refused to yield the stage in his allotted time, forcing festival organizers to cut his mic.
Loaf went eight minutes over with his hit, "Bat Out of Hell."
"They said you've got to get off the stage," Meat told the BBC. "I said you've got to be joking after only 12 minutes, you people are out of your minds."
The rotund rocker joked it would have taken 47,000 bouncers to get him off the stage.
The festival was expected to bring in more than $1.6 million for the Prince's Trust, officials said.