Sometimes there is a summer pop song which really sticks with me, this year it seems to be Miss Li - Komplicerat https://youtu.be/jVCTVOhn1_E (English version https://youtu.be/8dpmI25pQk4 )

It's easy to listen to, has a upbeat tempo and just a "A" in the refrain so it's impossible to not join in singing. Her voice sounds like a 17 year old but she is 38.