I would guess that “Francesco Barini” also sang “Total Verrückt” because his voice sounds very similar.
Not a lot is known about the artists behind these recordings. Who were “Francesco Barini”, “Delia Doris” or “Alexander Gordan”? In some cases there are probably some familiar names behind those fantasy names. The same goes for a lot of Budget labels. Some were simply branches of big labels. It`s hard to find out some forty to fifty years later. The story of the hundreds of German independent labels has not been written yet. There are still a lot of mysteries to be solved.
“Baby, ich schieß dir einen Teddybär” is a cover version of Jörg Maria Berg`s German version of Perry Como`s “Kewpie Doll” from 1958.