They are a YouTube singing phenomenon who have amassed a cult following around the world for their Jewish parodies of modern pop songs - and even count Barack Obama as a fan.
But singing group The Maccabeats played the gig to end all gigs on Thursday when they performed a special Chanucah show at Sinai Jewish Primary School in Harrow.
Taking to the stage to roaring applause from the school's student body, who range in age from four to 11, eight of the a cappella group's standout stars performed a medley of their festive hits, from Latke Recipe, sung to the tune of the hit song Shut Up and Dance With Me, to All About That Neis [miracle].
"We're in for a wonderful party here today," said Lord Levy, who kicked off proceedings by lighting the school's menorah, alongside Councillor Mark Shooter, mayor of Barnet, Gillian Merron, chief executive of the Board of Deputies, Steven Woolf, JFS' chair of governors, and Lee Glassar, chair of governors at Sinai.
"The Maccabeats have rushed here from performing at the White House," Lord Levy said. "I think we all know what is more important between doing a concert for Sinai and doing a concert for the President."
Mr Glassar, who sponsored the event, said that, every year, he was determined "to give our children the best experience possible".
He added: "I hated being at school. I want to differentiate us from the other schools out there and ensure that every child loves their time here."
Pupils waved their arms, danced and sang along for an hour as The Maccabeats delivered their best-loved hits - but it was one student, Adam Duke, who made a lasting impression.
After being called up by the band to mimic their beatboxing style on stage - using your mouth to mimic percussion sounds - the 10-year-old stole the show, demonstrating expert skill to rival the professionals.
"The Maccabeats were really, really good and involved everyone," said nine-year-old Rebecca Rose after the show. "They definitely weren't shy."
Robert Leach, headteacher of Sinai, added: "Here at Sinai, we make it our priority to give children a rich Jewish experience that they will remember for the rest of their lives.
"The Maccabeats' performance will be one of those moments."
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