Billy Crystal is a movie star, comedian, writer, director, producer, author, awards show host, Broadway star, and the world's most famous Los Angeles Clippers fan. He's been a city slicker, a mobster's psychiatrist, an animated monster, and a Comic Reliever. Over his long career, Crystal has been a nine-time Oscar host, a six-time Emmy winner, the director of " * 61," and on March 14, he celebrates his 70th birthday. Let's look back on some of Billy's greatest jokes, from the Oscars to his…