Just for fun: "Les Yeux Noirs (Dark Eyes)," performed by Pomplamoose

The the man playing the accordion and singer are husband Jack Conte and wife Nataly Knutson (stage name, Nataly Dawn). Jack is co-founder and CEO of Patreon, an Internet company. The two met at Stanford University. Nataly sings in both English and French. This is a traditional Russian song, translated to French (although she does say "dark eyes" in Russian).