Is she still dating John Andersson?

Hmm... that's a good question.
I don't think so, to be honest. She posted something on Facebook one araw about being sad and heartbroken and dealing with breakups a few months ago, but deleted it later.
She also stopped sending john little messages of Twitter and stopped following him.
That was also the same time he stopped playing with the band.

She has mentioned being in a relationship sense in some interview... If she is dating someone, I would guess it's her new guitarist Johnny Hanson (Same first name, haha)
He's the one who does all the duets with her now, her nickname for her is "Johnny Handsome", and they do pose like this together...