The music isn't a contest.
Lars (Will Ferell) and Sigrit (Rachel McAdams) are determined to enter and win Eurovision for Iceland which is made near impossible due to Lars' self-sabotaging nature. As the actual contest was cancelled this year due to COVID, this movie is a decent replacement with some decent songs performed throughout.
Very much Eurovision-ish!
There are also some nice comedic parts but if you don't like Will Ferrell, you might have a problem with this. In the same vein, if you haven't watched any real Eurovision you might not get some of the gags or the cameos. As a Eurovision fan I quite enjoyed it though, and give this film three jaja ding dongs out of five. Would I watch it again? Yes! In fact I already have! :)