Jennifer Usellis-Mackay, aka the Klingon Pop Warrior, sings "Somewhere Over the Rainbow" in her native tongue. The performance took place in 2015 at Chicago's iO Theater. From the video description:
Opening for Improvised Star Trek, I sang a new (old) song. Got some newly translated words the day of the performance... enjoy this little slice of nerdiness... or don't.
Vocals - The Klingon Pop Warrior (Jennifer Usellis-Mackay)
Guitar - The Red Shirt (Joe Mizzi)
Translation - Admiral qurgh (Christopher Lipscombe)
Video - Eric Scull
(via r/ObscureMedia)