What makes something "camp"? As there is no official definition of the word, it's actually quite difficult to pin down, but in terms of cinema it tends to refer to films that have been taken to the heart of LGBT people due to their flamboyance and vibrancy. Some are deemed camp for their exaggerated characters, while others are for featuring strong female leads who defy the conventions of male-centric cinema. Some are Oscar-winners; others are notorious for their tackiness. So what are the greatest camp movies of all time? Check out our top 20 below!