Elton was thrilled to join the star-studded line-up, telling reporters, "It's probably one of the most fun things you could ever do. What kind of event would you expect to see Meryl Streep singing with Jennifer Hudson and Bryn Terfel and Channing Tatum dancing, and Rosanne Cash and Vince Gill, you know?
"It was just such a program- and Bruno Mars, who is astonishing, and Esperanza Spalding. It's like a wish list of people you've never played with. It's the most fun thing to do."
Sting founded the charitable organization with his wife Trudie Styler in 1989 after witnessing the destruction of the Amazon rainforest.