Billy Joel surprises fan with impromptu performance on discarded piano

Billy Joel has just made his first live performance since February this year ... but only one fan got to enjoy it.

The lucky viewer caught the music legend on camera playing a piano that had been left out on the sidewalk in Long Island, presumably to be thrown out.

The 'Uptown Girl' hitmaker - who was on a motorcycle ride - can be seen tickling the ivories with a Ragtime style tune while checking out the condition of the instrument.

"Not bad. The action is good. It just needs tuning and the finish is beat. But, it's a perfectly good piano," the 71-year-old can be heard saying in the clip to his fan.

"It's a shame to throw it out, should at least be donated to St. Vincent de Paul or something."

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To which the off-camera fan informs Joel there is a thrift store up the street.

"They'd probably take it," the Piano Man responds, still wearing his motorcycle helmet.

"These are laminated keys, the pedals work, the action is great … The mechanics are perfect!"

We hope the piano found a good home.

Joel's concerts at various stadiums around the country as well as his Madison Square Garden residency shows have all been postponed until 2021.