Billy Joel attended a Billy Joel concert this past week on Long Island, New York.

The “Piano Man” was invited to Glen Cove’s Deasy Elementary School spring concert to watch students perform a tribute to his career.

But it was the kids who received the surprise of a lifetime when Joel actually showed up for the concert.

School principal Nomi Rosen said, “We invited Billy Joel on a lark, but we didn’t expect him to come. It was totally thrilling.”

Joel sat in the back of the auditorium so he wouldn’t make the students nervous as they played 15 of his greatest hits.