On last night’s “Tonight Show” broadcast, Jimmy Fallon demonstrated the voice-looping iPad app, Loopy HD, to Billy Joel.

Joel and Fallon then used the iPad to perform a mostly a cappella version of “The Lion Sleeps Tonight.”

“Jimmy Fallon’s MacBook may have mysteriously lost its illuminated Apple logo but it seems his love for Apple products hasn’t wavered,” Dan DeSilva remarks for 9to5Mac.

“The host was the first to record his vocals on the looper app. Joel joined in soon after, performing ‘a-weema-weh’ in a variety of keys,” Zach Johnson reports for E! Online. “Fallon then introduced the lyrics to the 1961 classic by The Tokens. The audience clapped in unison as The Roots backed the fast friends up from the side of the stage.”

[Thanks to MacDailyNews readers too numerous to mention individually for the heads up.]