The man told police that he woke up when he heard the robber making a noise in his stairwell. But by the time he got to the scene, it was too late, reports Geseke News.
The thief was already making a getaway on his skateboard with Helene tucked under his arm.
Fischer is currently Germany's most popular singer and is in the middle of a sell-out tour of the country.
A police spokesman told The Local “getting Ms. Fischer back isn't top of of our agenda. We actually have other things that are more important to do.”
He went on to explain that “if we were talking about the real Helene Fischer we would probably be a bit more concerned. But this one is only a cardboard cut-out.”
The life-sized cardboard cut-out was the only item the thief stole, the spokesman confirmed. He pointed out that the must-have items are currently sold out in her fan store. He could not confirm whether the two events were connected.
The spokesman added that police have not published a description of the hostage, as is usual in such situations.
“We don't have any pictures, but I'm assuming that everyone knows what she looks like,” he said.