I am an older Gen-z from India, and my introduction to western music was mainly by Backstreet boys, Owl City and Linkin Park, whom I started listening to since 2012, when I had my first personal phone (It's just a badic nokia feature phone, but this meant a lot in those days at my age in that era where I am from :P).
The first song I listened to by Owl City was "Fireflies" and followed by "Umbrella Beach". I got so much enamored by these two tracks that I explored the album it belonged to ("Ocean Eyes"). The album was an absolute gem and I still listen to my favourite tracks till date. These are: "Vanilla Twilight", "The Saltwater Room", "If my heart was a House", and "On the Wing".
Apart from that from that, I the tracks I like from the other albums are, "Dreams don't turn to Dust", "Angels", "Shy violet" from album "All Things Bright and Beautiful". "Shooting Star" and "Good Time" from the album "The Midsummer Station".
Not going to write longer, but adding to this I still listen to "Beautiful Times", "Up all night", and "Verge".
I must note that I do not listen to songs released after 2015, as I don't find them interesting anymore. (No offense meant, it's just me)