Because celebrities are self-absorbed and arguably certifiable humanoids who latch on to the hottest trends at the their PR flacks’ collective cue, it only makes sense that beefing between Hollywood’s A-through-Z-Listers traveled from the streets to (cyber)space with the advent of Twitter. Thanks to Ashton Kutcher, who himself had a back-and-forth battle with CNN about who could gain 1 million followers the quickest back in 2009, the microblogging service soared into America’s consciousness and became the next big thing among America’s self-conscience, i.e. those fame whores on our TVs, radios and movie screens. Some celeb Twitter fights are tame (get a new hobby, Jill Zarin), while some are downright insane (Does Courtney Love having typing Tourette’s?). These 10, however, are the 140-character-or-less feuds that came from left field, traveled around the world, and sometimes boomeranged back to bite their respective senders on the ass.