Husband crossed the line with porn

So this weekend I was on my husbands phone and noticed in his history he had looked up ariana grande porn I guess hoping to find porn that looked like her.  I know he looks at porn and that's a sore spot for me but I try to be understanding bc most men do.  But my issue is that my best friend looks just like ariana grande and I feel as if he must be into her if he looked up porn of someone who looks just like her. I confronted him and he said it had nothing to do with my best friend and he doesn't even think they look similar and that he had a dream about ariana grande and that's what sparked it. In the pastthough  he had said how unattractive he finds Ariana grande and he finds it so weird that my best friend tries so hard to look like her. Am I wrong or crazy to be this upset?