Ben Southall - Winning the Best Job In The World was never going to win him fans so it's not surprising this tweet was noticed even though it was quickly deleted and corrected. For $150K it seems people expected him to get his facts straight.

Deborah Hutton - Gives a lesson of what not to do. This tweet is fine except that she's a spokesperson for Qantas. Oops.

Hugh Jackman - This is arguably the biggest twit of the year. The first mistake was the name - it turns out the RealHughJackman was actually Hugh Jackman's PR. Our favourite furry star never quite recovered from this and hasn't tweeted since May.

Phil Hughes - Cricket Australia was surprised to say the least when Phil Hughes decided to give fans - and the competition - this heads up 3 hours before start of play. In his defence, it was Hughes' manager who sent the tweet, blaming time differences.

Stephen Fry - Oh no! Even though he is not averse to posting a narky tweet (see above), Stephen Fry decided he had received one nasty tweet too many and threatened to abandon his 1 million followers. He soon changed his mind, somewhat sheepishly.

Katie Price - Straight from the horses mouth ... Katie Price, aka Jordan, corrected the media reports about her split with Peter Andre with this tweet: 'papers got wrong AGAIN pete said IM GONNA BREAK YOUR F*ING LEGS watch your back >> nice pete in front of the kids!' She then appealed to her followers (haters) with what was perhaps an unfortunate choice of words.

Ashton Kutcher - The poster boy of Twitter, Ashton Kutcher, potentially put himself in the doghouse with this tweet. Unbelievably the photo is still there (for posterity?), so one assumes Demi - a chronic oversharer herself - doesn't mind.
Courtney Love - On Twitter is everything you would expect and more. Her tweets (ahem, rants) were so indecipherable there were doubts that @courtneylover79 was actually her. One notable tweet was in response to Kurt Cobain's avatar being used for Guitar Hero: 'This is NECROPHILIC this is VILE.' Alas, Love has since left Twitter. Photo: Getty Images

Miley Cyrus - She came, she tweeted, she left, and then she rapped about it. Next. Photo: AP

Andy Roddick is as entertaining off court as he is on. Refusing to be censored, he served it up to the Powers That Be with his 'lame' tweet. He also publicly defended Andre Agassi in a series of tweets and slammed his wife's taste in music.

Meghan McCain caused a stir when she posted a pic of her quiet night in with the girls. She copped so much flak that she considered abandoning Twitter. Never mind, she is still on there, just a little more conservative than usual.

Lance Armstrong rewarded followers with this invite. Celeb tweeters take note, this is an exampe of what TO do.
It seems Lily Allen forgot that Twitter is full of music stealers - I mean sharers. After copping heavy flaming she said goodbye and took a step back from the online world. She hasn't shut down her account so maybe she will be back.

John Mayer tweeted this after breaking up with Jennifer Aniston. Proving he was aware of his love rat status, he also posted this: "I just voted on People's 'Is John Mayer a Keeper?' poll. I clicked 'Love Him' but 'Lose Him' is winning at 63%."

Demi Moore gives husband Ashton Kutcher a run for his money with this oversharing tweet. Too much information!

Powderfinger  - Taking a leaf out of Lance Armstrong's book, Powderfinger delighted followers with free! impromptu! concerts! Nice work!

Lindsay Lohan - Did I say that? Funnily enough probably no one would accuse Lindsay Lohan of not following this mantra. Other notable tweets include a meltdown over her breakup with Samantha Ronson and a topless twitpic. Cheers to you LiLo!

Tiger Woods never got the hang of Twitter. This obvious tweet was quickly followed by two more self-promoting posts and then ... nothing. No posts since June. We can only assume Tiger has been busy with offline activities.