After video of him singing The Righteous Brothers' timeless "Unchained Melody" went viral on YouTube, it got the attention of Late Late Showhost James Corden, who invited him to perform on Wednesday's show.
"It has had over 40 million hits in a week, this guy has gone from singing on the subway to being a genuine international sensation. I was desperate to find out who he was and find out his name," Corden said.
See photos of James Corden:
LONDON, ENGLAND - JULY 20: (EXCLUSIVE COVERAGE) (L-R) James Corden, David Walliams and Rob Brydon attend the closing night of 'Monty Python Live (Mostly)' at The O2 Arena on July 20, 2014 in London, England. (Photo by Dave J Hogan/Getty Images)
LONDON, ENGLAND - JULY 02: James Corden and Mark Ruffalo attends a Meet The Cast event for 'Begin Again' at Apple Store, Regent Street on July 2, 2014 in London, England. (Photo by Danny Martindale/WireImage)
NEW YORK, NY - JUNE 25: Actors James Corden, Keira Knightley, Mark Ruffalo and Adam Levine attend the 'Begin Again' premiere at SVA Theater on June 25, 2014 in New York City. (Photo by Andrew H. Walker/Getty Images)
LONDON, UNITED KINGDOM - MAY 18: James Corden arrives at the Arqiva British Academy Television Awards after party held at the Grosvenor house, Park Lane on May 18, 2014 in London, England. (Photo by Niki Nikolova/FilmMagic)
LONDON, ENGLAND - FEBRUARY 19: Host James Corden presents The BRIT Awards 2014 at 02 Arena on February 19, 2014 in London, England. (Photo by Matt Kent/WireImage)
LONDON, ENGLAND - FEBRUARY 17: Suki Waterhouse, Bradley Cooper, Julia Carey, James Corden and Anna Wintour attend the TOM FORD show at London Fashion Week AW14 at The Lindley Hall on February 17, 2014 in London, England. (Photo by Nick Harvey/WireImage)
LONDON, ENGLAND - FEBRUARY 17: (L to R) James Corden, Anna Wintour and Bradley Cooper attend the TOM FORD show at London Fashion Week AW14 at The Lindley Hall on February 17, 2014 in London, England. (Photo by David M. Benett/Getty Images)
LONDON, UNITED KINGDOM - OCTOBER 22: Chris Pine and James Corden at the Groucho club on October 22, 2013 in London, England. (Photo by Mark Robert Milan/FilmMagic)
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Corden flew the New Yorker to Hollywood to perform. Accompanied by a guitarist, Yung didn't just wow the crowd, but the host himself, who watched with his hands covering his mouth most of the time.
Corden, who had a visible smile when he was not covering his mouth, then spoke to the singer after the inspiring performance.
"Mike, what's it been like since that video was posted online?" Corden asked.
"It's been awesome, man," the 56-year-old said. "I got to meet you!"