It's fun to imagine though! Maybe Percy would enjoy:
* Bands with a Greek mythology theme: Imagine him jamming to bands like "The Muses" or "Hades & the Underworlders" (inspired by the gods!).
* Upbeat, energetic music: Percy is adventurous and loves action, so something like rock or pop music might be his jam.
* Something calming: After a long day of fighting monsters, Percy might enjoy a peaceful playlist of acoustic guitar or classical music.
Ultimately, Percy's favorite singer is up to your imagination!