Phil Collins has an unusual piece of memorabilia stashed away at home - the original lyrics for In The Air Tonight written on a piece of paper belonging to the man his wife left him for.The star was devastated when his wife of five years, Andrea Bertorelli, left him for a decorator and went on to write the classic hit. Collins admits he scribbled down the words on a piece of paper left behind by the painter after he ran away with his wife. And the star is convinced it will be a coveted item if it ever goes to auction. He says, "Ironically, when I sang the original demo and wrote down the words, I used a piece decorator's stationary - the decorator who my wife went off with. "An interesting piece of memorabilia, should I ever wish to sell it."