Roger Daltrey

Singer jokes that his knees are sore as he ends 24 years of staging events for sick kids.

Singer says the idea of returning to America is "very doubtful."

"People want to hear the old music," singer said. "I don't know why, but that's the fact."

Concert for New York City was emotional, "The Rolling Stones Rock and Roll Circus" was fun and Woodstock was overrated, singer says.

Invaluable advice from the pre-AC/DC days guided him through career lulls.