The ink is barely dry on their twin tattoos, but Nick Cannon may already be wishing his was in Sharpie. UK's News of the World reports that all is not well between the actor/DJ and his wife Mariah Carey, claiming Mimi's diva antics are to blame for their domestic un-bliss. "Things are really bad between them. The honeymoon period was over before it began. Nick's been surprised at just how demanding his wife is," a source reveals to the gossip rag. Umm, maybe Nick should have Google'd his bride-to-be before saying "I Do"?