“Schlager” (loosely meaning ‘hit’ in German) is a form of pop music that is particularly prevalent in Eurovision, and is most commonly associated with the Nordic countries, especially Sweden.
The actual sound of schlager has changed over the decades, but what we have come to know about modern schlager in Eurovision is that it is usually a high-energy, dancefloor filler more often than not performed by a big-voiced female, and is typically characterised by a dramatic key change before the final chorus.
The genre itself is fairly divisive amongst the Eurovision fandom. On one hand many fans adore schlager and for them embodies what they love about the Contest. But on the other hand, a number of other fans dislike schlager a great deal, considering it to be cheap, silly pop fluff that gives the Contest a bad name.