Thanks to film and television, we always secretly hope for a hot neighbor everytime we move into a new apartment. You know the type: the cute girl next door with the with charming smile and really flattering jeans who makes it a hobby to come by your place unannounced, kind of like The Big Bang Theory's Penny, a.k.a Kaley Cuoco, who turns 26 today. Of course, she wasn't the first to transform the idea of getting some sugar from your neighbor. Check out The 15 Hottest Girls Next Door for a full rundown.