London (CNN) -- French President Nicolas Sarkozy and his U.S. counterpart Barack Obama have come under fire after they were overheard talking rudely about Israeli Prime Minister Benjamin Netanyahu at the G-20 summit.





Sarkozy was overheard telling Obama: "I can't stand him. He's a liar," according to French website Arret Sur Images.





Obama is reported to have replied: "You're tired of him; what about me? I have to deal with him every day."





The comments have provoked criticism in Israel and the United States -- but it is not the first time a prominent figure has been caught off-guard, on-mic. CNN looks back at 10 of the most infamous gaffes.





Gordon Brown on 'bigoted' voter





Then-British Prime Minister Gordon Brown's 2010 election campaign was not going well, but he had no idea how much worse it was going to get when he stopped to chat with a voter a week before the poll.





Gillian Duffy, then a 66-year-old pensioner, proceeded to berate Brown, explaining why -- despite having backed his Labour party all her life -- she was now "ashamed" to admit her political allegiance.





Brown kept up a polite conversation with her as the TV cameras looked on, then drove away unaware his microphone was still on.





Once inside the car, he complained to advisers: "That was a disaster. They should never have put me with that woman... Ridiculous... Bigoted woman."





Brown later apologized, but went on to lose the election.





George W. Bush to Tony Blair





Brown's predecessor, Tony Blair, was witness to one of the most famous on-mic blunders by U.S. President George W. Bush during a lunch meeting at the 2006 G-8 summit in Russia.





Bush hailed the prime minister with the greeting "Yo Blair!" and thanked him for a recent gift of a sweater. He then began discussing the situation in the Middle East, offering a not-entirely-diplomatic solution to the difficulties between Syria and Israel.





"What they need to do," he told Blair, "is get Syria to get Hezbollah to stop doing this s--- and it's all over."





George W. Bush on reporter





The 43rd President of the U.S. was no stranger to the gaffe -- entire books were written about his famous "Bushisms" -- and they were in evidence even on the election trail.





At an Illinois campaign stop in September 2000, Bush was caught on camera referring to New York Times reporter Adam Clymer as a "major-league a------" -- to which his running mate Dick Cheney replied: "Oh yeah, big time."





Bush later said he was sorry his comments -- intended, according to his advisers, as a "whispered aside" -- were overheard.





"I regret that the private comments made it to the public airwaves," he said. "I regret people heard the comments."





Prince Charles on royal correspondent





George W. Bush is not the only one to have voiced his frustration and anger at a member of the media in an unguarded on-camera moment.





Prince Charles got himself in hot water with the British press when he was caught muttering under his breath about a reporter to his sons William and Harry during a photocall on a skiing holiday in Switzerland in 2005.





Taking exception to a question from the BBC's veteran royal correspondent, Nicholas Witchell, the prince complained: "Bloody people. I can't bear that man. He's so awful, he really is."





The comment did little to repair Charles' fractious relationship with the media, and proved that gaffes can still offend, even when couched in polite language.





Joe Biden to Barack Obama





U.S. Vice President Joe Biden is in a class all his own when it comes to putting his foot in it.





In one of his most famous blunders, he was caught on tape dropping the F-bomb while congratulating Obama over the signing of the controversial healthcare bill in March 2010.





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