Yay, I requested this! Anyways, I always read these when I'm completely bored and I just can't help myself: I have to laugh out loud, even if I'm in a drop-in computer lab at school. They have the most ridiculous scenarios. Here are a few I've read so far.
1. William Beckett comes through a random girl's window at night while she is in the middle of having a Santi release-party with her friends.
2. Victoria and Gabe are casino robbers/drug dealers/prostitutes, and Victoria is quite skilled at Russian roulette.
3. Alex Gaskarth falls in love with a new next door neighbor from Laguna Beach and does absolutely nothing but pine for her. Not so funny in itself, but you seriously need to read some of the things he says in that fic. So out-of-character.
Here's one that's really good though. Not in a funny way, but it's really well-written: http://www.quizilla.com/stories/4754263/shallow-love-shallow-lives-01-derek-sanders
Make sure you go to the user's page after you read the first chapter and look for the rest of the chapters. Believe me, it's a good story, at least in my opinion, albeit a little short. If you have an account, you can rate or leave the author a message. She got one from me and she replied, so I'm assuming she'll do the same for anyone who messages.
Seriously, if you haven't read them, you need to. You have not lived properly until you have read at least one real person fanfic. If you go to Quizilla and type in the name of a celeb in the search bar, they'll come up. Have fun.