She's probably one of the most recognisable names in the world after Justin Bieber and Ronald McDonald, but there's still a sizeable population of the universe who don't know who Margaret Thatcher is.
Some suggest that she was on I'm A Celebrity (that was her daughter, Carol).
Others think she might have played Professor McGonigal in Harry Potter (Nope, that's Maggie Smith, close though).
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And some, according to Wonderland magazine, think that it's Cher that has died, because of the hashtag #nowthatchersdead.
Despaired of humanity yet?