The woman being refereed to in "She's so Heavy"?
Yes, that's right, Ayn Rand, subject of no fewer than seven out of ten love songs in all of popular music. If there was ever a true doubt in your mind, than you are a moral slave worthy only to wax my Lamborghini.
By the way, "Happiness is a Warm Gun" is about the joys of using lethal force to defend one's inanimate property. What did you think he was talking about anyway?