Chalkdust So the group is Die Lollipops... feminine gender, that's fine. But the song is Sommer DER Lollipops... masculine? Furthermore it appears they live in a world with two differently gendered suns. die Sonne and der Sonne.
It's all too much for me to process.
Tameriaen You're thinking about the nominative case, the dative/genitive form of "die" is "der". In this case "der" basically means "of the". I think, anyway.