If Where I Belong was melody & vocal driven, Where Were You Last Night is more of a Dancepop. It has more pronounced production & there's a hint of EDM (those hooks!). I am not an expert at this, but I can feel the elements of EDM/House in this song alongwith some RnB (again, am no expert)!
Where Were You Last Night is a perfect dance song, thanks to those super catchy hooks in its post-chorus. The moment intro begins, you get the idea what you're going to hear. I repeat, chorus & post-chorus hooks are super catchy & highly addictive. It stays in your head for a long time. Production is quite massive & melody is easy on ears. Heavy production sometimes leaves little scope for vocals but not here!! Jonas sounds good, his vocals are perfectly delivered & he does a great job with Where Were You Last Night.
You will love the song, for sure. And since he is a self-made artist, it adds to the overall value. Listen to it below.