Apparently she held a mini ukulele concert in a public place, which she organised over Twitter. The local police, who didn't see the bright side of her performing so close to a war memorial and without permission arrested her for it after 20 minutes!
And after her May 11 snafu in Amsterdam, it seems Palmer needs to be cautious about more than just posting revealing posts online.
"What they technically nailed me for was an open container," says the singer regarding her arrest during her impromptu "ninja gig" at Dam Square. "A fan handed me a beer which is technically illegal in Holland. It's not illegal in Germany where I actually spend most of my time. I neglected to realize it was probably a stupid thing to be doing given the amount of police around.
"I was very cavalier about the gigs I've been doing. I think it was only a matter of time before they got a little too big and a little too loud -- there's a difference between a circle of 20 people and a crowd of 200."
"I feel a degree of humility in the face of being carted off by a bunch of foreign police," adds Palmer, thankful she was only briefly held at a police station before being fined and released.