I'm 99.9% sure that is not Vampirella.
Later that same year, Ken received his first professional assignment. Before he turned the painting in, he took it to Frazetta to get his approval. Well, Frazetta did not think that the woman in the painting had a terrified enough expression on her face, so he painted over her old face, with a new one of his own, which he felt worked better. Now it was ready to be turned in. That painting was done for Warren’s Vampirella Magazine and is titled, “The Lurking Terror”.