Ahm, let's see...
Wannabe by why mona,
Wellerman by that guy who's name I can't remember right now,
Other Friends by Spinel from Steven Universe,
True Kinda Love by Garnet from Steven Universe,
Nastuhiboshi by Nastuhi, a character from Naruto (Shonen Jump)
(sometimes Sweater Weather from either Pentatonix or The Neighbourhood gets stuck in my head, too)
...
There are others that I cannot think of rn, but listen to any of these songs. They get stuck in my head frequently
-Nobi