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Billy Joel and Jimmy Fallon Form 2-Man Doo-Wop Group Using iPad App

Jimmy and Billy Joel loop their voices on an iPad app to form a 2-man doo-wop group -- singing "The Lion Sleeps Tonight" by The Tokens in 4-part harmony.
The Tonight Show Starring Jimmy Fallon

Billy Joel and Jimmy Fallon Form 2-Man Doo-Wop Group Using iPad App

Jimmy and Billy Joel loop their voices on an iPad app to form a 2-man doo-wop group -- singing "The Lion Sleeps Tonight" by The Tokens in 4-part harmony.

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