Isaac Geralds aimed to break Sunil Waghmare's 2012 record by singing continuously for 110 hours.
He withdrew at 98 hours and 26 minutes owing to a medical emergency. He began on Sunday, June 2, 2024, and completed on Thursday, June 6.
In a press statement on his Instagram page, his team claimed, "We would like to announce that Isaac Geralds, the great musician and advocate, made an incredible attempt to break the Guinness World Record for the longest sing-along.
"Despite a medical emergency that prevented him from completing and exceeding the record, Isaac's effort was nothing short of extraordinary.
"It was a hard but necessary call for medical professionals to make. His commitment to supporting children with autism and their families remains as strong as ever."
Geralds' sing-a-thon was for a good cause. He planned to raise $500,000 and awareness for children with autism through this singing marathon that took place in Washington, D.C. The funds were to support The Children's National Hospital in DC and the Efe Irele Autism Foundation in Nigeria, two organisations providing care and support to the autism community.
Before the attempt, Isaac was a finalist in season 4 of MTN Project Fame and released his debut album, Love and Heartbreak, alongside superstars like Tiwa Savage and Ladipoe.