LA tattoo artist Kat Von D knows how to mark a man as her own. Her new boyfriend, Deadmau5, was branded under his eye with a star matching her own when the two of them showed up Saturday (Oct. 13) outside Urth Cafe in WeHo. Deadmau5 (his Mom and Dad know him as Joel Zimmerman) is a Toronto DJ who, according to London’s Daily Mail shares Kat’s passion for posting pics of their cats online.