<p>If you can name five Kardashians but can't name five countries in Asia, stick a knife in an electrical socket."</p><p>That piece of counsel, Kelly Oxford's most successful tweet of all time, is the kind of one-liner that gets you 10,000 retweets and counting. It's also the sort of material that takes a woman from stay-at-home Canadian mother to bestselling author, Hollywood screenwriter and, of course, Twitter celebrity.</p><p>Oxford had no connections to the entertainment industry, no knowledge of the workings of Hollywood and nothing more than an average high-school education. She didn't, by her own admission, even have much ambition. What she did have was a voice, and it was distinct, honest and funny enough to draw famous fans from the moment she started tweeting. They include the late Roger Ebert "Well, she's bitingly funny, but everybody knows that" as well as Lena Dunham, who described her as "like your cool babysitter who teaches you about sex and sarcasm in an uncreepy way". Jimmy Kimmel, an early champion, said: "Not only is Kelly Oxford hilarious, she is consistently hilarious. Her tweets make me laugh several times a day. I can only assume that she is neglecting her children."</p><p>Oxford's status has just been sealed with a first book: what could be more solid proof of "having arrived" than a New York Times bestseller. Everything is Perfect When You're a Liar is a collection of scattershot essays, written with the UPPERCASE EXTROVERSION of a teenage girl who's drunk three too many Bacardi Breezers. Not a bad thing, particularly when the writing is shot through with glinting sarcasm and, to use her terminology, the palpable "giving of zero fucks".</p><p><a href="http://www.guardian.co.uk/technology/2013/may/11/twitters-first-star">Keep reading...</a></p>