Just like a temporary tattoo, Kat Von D and Deadmau5 are done. The tattoo artist tweeted the shocking news on Wednesday saying, Cheating on your loved one is the most hurtful thing one can do. I hate to have to admit, that this relationship is indeed over. You know what they say, once a cheater, always a cheater. When a fan responded to Kat telling her not to take him back, she responded saying never. Our hearts go out to you, Kat!