Disclaimer first: I got this interesting piece only in a Russian-dubbed version,of which I understood an occasional word or two, so I can't comment on the dialogs.
As the title strongly indicates, you get a bigger share of song & dance items (mostly 1980s disco music) than usual in Bollies. But given that most protagonists do singing and dancing for a living, they fit in quite naturally, and add to humor (I liked the sabotage of a Lions' Club classical music event best, the Xmas party less so) or drama.
And drama there is aplenty. A mother abducted, and fleeing to the woods, brother and sister growing up as orphans, doing song & dance for a living. Both marry, and go through different fates, in which (stylized) alcoholism plays no small role.
Then there is the super-bad guy (who looks his role exceedingly well) and his motorcycle gang... All in all, a strong emotional piece, which in the end left me with a good feeling. Not a must-see, but certainly not a bad experience if you can get hold of it.