Even your idols have idols. Rock legend Elton John has always admired singer-songwriter Leon Russell.
"He was my biggest influence as a piano player, a singer and a song writer," John said.
After more than 250 million albums sold worldwide, John returns to his musical inspiration.
"It's this time of my life. It was so great to go back ... and make a record with someone I wanted to be like," John said of Russell, "even though I don't have the range of piano technique or the voice."