Most Helpful Girl
Sia isn't American, she's australian 😜0
I would say that's probably DJ Bobo. He sold millions of albums and was one of very few Swiss artists who were internationally successful on a large scale. A lot of foreigners like him. Ironically, most Swiss people (including myself) find him rather annoying.
I would suppose Renārs Kaupers is the most popular here. Don't really listen to him but I don't turn the songs off when they come up on the radio.
Over my lifetime U2