Am not sure because her live songs don't usually sound like the finished product, so I'll just wait for the official release and I hope it's longer than 3 mins.
Just because it's got a rebellious attitude to it and it's immature doesn't mean it's like Avril Lavigne. I don't think she ever really sang about getting high or getting wet... And this is super catchy. I think just from this snippet, it sounds like Charli managed to pull off the punk inspired pop song she was talking about without being "pop punk".