This is an example of two popular pop singers Špela Grošelj and Domen Kumer singing a nice Slovenian waltz Čez leto ali dve (In a Year or Two). One more proof how excellent vocals can make a huge difference in popularity of certain genre of music.
The lyrics go something like that in Slovenian:
Čez leto ali dve
bo drugače vse,
le ljubezen najina še bo trajala...
And in English:
In a year or two everything will be different only our love will still last...