John Hetlinger is 82 years old and hails from a town just north of Denver, Colorado.
Now retired, Hetlinger was once responsible for repairing the Hubble Space Telescope.
Nowadays, he focuses on his karaoke career, but with an unusual twist – at least for an octogenarian.
Helinger surprised the judges of NBC’s reality singing competition, America’s Got Talent earlier this week, when he took to the stage to perform Bodies by Drowning Pool.
The audience loved it, and we’d be lying if we said that we didn’t either.