I feel like everyone sings all the time lol. But the most frequent singers would be Apollo, Renee, and Zell. But I've gotten pics of Diana, Coco, and Piper singing together and they're not frequent singers.
Judy sings all the time. I feel like every time time I see her she is singing or swaying to a beat, with or without music!
It's super cute. But I think she doesn't like being watched while she sings, because every time I try to take a vid, she turns her head or looks down shyly lol
Static and Cherry sings alot. Especially Static. I notice Crankies sing alot because when Groucho was in my island. He would sing alot too. I find it funny cause out of all of the personalities the cranky ones seem to be happy and sing their lungs out.
Marshal out pepped my peppy in being a pop star. He sings ALL day EVERY day. Not even an exaggeration. I don't mind it and actually find it cute. Sometimes he goes onto the campsite platform and sings on there like it's his personal stage haha XD Next, after Marshal, I have Marina and Chief singing like once a day. And for the rest of my villagers, I have seen them singing only once or twice lol. I am lookin at you Dom, Sherb, Stiches, Ketchup, Raymond, Twiggy, and Rex.
Apollo, Cyd, Eugene, Flo and Ursala are the main five of my islanders who sing often. I have two music players on all the time in different sections of the island; both are playing KK Soul. I have heard/seen both Apollo and Ursala whistling, too, when KK whistles in the song!