Are Tia and and Tamera Mowry “Twi-Hards?” We guess so. The two looked super excited at last night’s Hollywood premiere of “The Twilight Saga: Eclipse.” They better watch out for lead actor Robert Pattinson; the blogosphere is abuzz that his lineage can actually be traced back to the original vampire, Vlad the Impaler of Transylvania. Other stylish siblings in attendance were Jaden and Willow Smith.