My friends and I discovered the magic of 27 in college, realizing that people would frequently cite the number 27 in conversation when needing a random number. For example:
"Oh my God, I love this movie. I've seen it like 27 times."
We then began seeing it creep into other things...movies, songs, TV shows. We discovered a website called The 27 Conspiracy, which was a great source of sightings for a while...but Brandon, the keeper of that site, got too busy to keep up with it.
Weird Al Yankovic references the number 27 in a lot of his songs and videos.
You can see more examples at our blog, The Chronicles of 27 .