"That means that they chose to support the group, support the art," he said. "God knows how many people listened to it online and didn't buy it, downloaded it for free and didn't think about it."
Peas 'I Gotta Feeling' downloaded 6 million times →
"It's a positive, feel-good song at the time where there's question marks and uncertainty. People want to be reminded that it's going to be all right," he said.