The legend performed his hit "Mandy" on the tune's 40th anniversary

By Jeff Nelson
Updated February 15, 2016 02:25 PM
Credit: Kevin Mazur/WireImage

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Just days after undergoing emergency surgery, Barry Manilow hit up Clive Davis’ annual pre-Grammys bash for a surprise performance.

He had to be there for Clive being the showman that he is,” a rep for Manilow tells PEOPLE.

Introduced by Davis to the crowd’s delight – Foo Fighters rocker Dave Grohl was particularly thrilled, proving himself a Fanilow as he leaped to his feet and pumped his fists – the singer, 72, performed his breakout hit “Mandy” as footage from him singing the same tune at Davis’ inaugural party 40 years ago played overhead.

“I’m really glad to be here. What a week!” Manilow said, as Billboard reports. “This is the 40th anniversary of the release of ‘Mandy’ – and the beginning of this beautiful party.”

And the celebration served as a date night for the singer, who attended with his manager and longtime love, husband Garry Kief.

Last week, Manilow underwent emergency oral surgery and was rushed to an L.A. hospital after a sold-out show in Memphis. Friday, the singer’s rep told PEOPLE was “doing well” following a successful surgery but that he was instructed not to talk, sing or rap for 48 hours.

Despite his appearance at Davis’ star-studded soirée – which the label exec first threw in 1976 in part to celebrate Manilow’s success with “Mandy,” as the L.A. Times reports – it’s still unclear whether Manilow will attend the Grammys Monday night, where he’s up for Best Traditional Pop Vocal Album for his My Dream Duets LP.

With additional reporting by REAGAN ALEXANDER