Justin Timberlake Sings 'Happy Birthday' to A Boy with Autism

PHOTO: Justin Timberlake performs on stage at the 02 Arena in London, June 10, 2014.PlayDave J Hogan/Getty Images
WATCH Justin Timberlake Sings 'Happy Birthday' to Boy With Autism

Justin Timberlake made one boy's birthday unforgettable.

The singer, along with a crowd of thousands, serenaded eight-year-old Julian Delan during his concert in San Jose, Calif. earlier this week.

"Thank you JT for an incredible night!! This is a moment Julian will never forget!" the boy's father, Peter Delan, wrote on Facebook. "Thanks for Gifts you sent down to him. #bestnightever #happybirthdayJulian #the2020experience #JustinTimberlake #yourbiggestfanisan8yearold"

In a YouTube post, the boy's mother explained that she was nervous to take their son, who had been diagnosed with high-functioning autism, to the show, for fear that other concert-goers would react badly to his "obsessions, his volume, his repetitiveness, his clumsiness." Instead, a group of women were able to draw attention to the birthday boy, who had been "knocking into the chairs and dancing and singing and yelling, 'It's my birthday! This is my present! This is my present! I love you JT!'"

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What happened next was a moment she and her family will never forget.

"Justin Timberlake was singing Happy Birthday. They all were," she wrote. "The awesome grandmother of 3 sitting in front of us. The model-esque girls sitting to our right. The people sitting to our left that offered us the video that they captured of the whole thing. They were all singing."

And Julian Delan was grinning ear to ear.