This is the 9955th most frequent Swedish word.
hitsingel
A hit single.
In this sentence, 'hitsingel' refers to a song that achieved significant popularity and success on music charts in Sweden.
Den låten blev en stor hitsingel i Sverige.
That song became a big hit single in Sweden.
Here, 'hitsinglar' (plural form) is used to describe individual songs released by the artist that gained widespread recognition and popularity.
Artisten släppte flera hitsinglar under sin karriär.
The artist released several hit singles during their career.
In this context, 'hitsinglarna' (definite plural) refers to recognized successful songs that are currently trending or have had recent positive reception.