Joshua Winslow Groban is an American singer, songwriter, actor, and record producer. His first four solo albums have been certified multi-platinum, and he was charted in 2007 as the number-one best selling artist in the United States, with over 22.3 million records. As of 2012, he had sold over 25 million records worldwide.
Groban originally studied acting, but moved to singing as his voice developed. Groban attended the Los Angeles County High School for the Arts, a free public school on the campus of California State University, Los Angeles, where students receive a conservatory-style education.David Foster called Groban to stand in for an ailing Andrea Bocelli to rehearse a duet, 'The Prayer', with Celine Dion at the rehearsal for the 1998 Grammy Awards. Rosie O'Donnell immediately invited him to appear on her talk show. Foster asked him to sing at the California Governor's Gray Davis' 1999 inauguration. He was cast on Ally McBeal by the show's creator, David E. Kelley, performing 'You're Still You' for the 2001 season 4 finale.

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Josh Grobantook some time out of his busy schedule to sing Leonard Cohen's iconic song Hallelujah with some very lucky students at P.S. 91 elementary school in Bronx, New York on Saturday (Apr. 2) afternoon. The singer-songwriter posted the breathtaking performance on Instagram alongside a note of gratitude. 'Thanks PS 91 kids for pulling me up to sing Hallelujah with you!' wrote the 36-year-old.

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The Los Angeles native also posted a photo gallery on Instagram of him embracing the students and giving them a little music lesson. In the caption, the You Raise Me Up singer further thanked the school for an 'inspiring afternoon'. The multi-talented star stated: 'Thank you Kathy Damkohler executive director of Education Through Music and Principle Meredith Struhl Nasjlett.'

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Josh also complimented the children on their spectacular voices and ambition, “[thank you to] the students for their glorious voices and focus and drive… Future leaders in the making.” It’s been a busy few months for the GRAMMY winner, who continues to promote his latest album Stages Live in addition to lending his voice to the soundtrack for the live adaptation of Beauty and the Beast. Josh’s song “Evermore” is featured alongside stunning ballads sung by Celine Dion, John Legend and Ariana Grande.