If you show any of these symptoms, you could be turning into 
Serena:

-strange black cats with cresent moons on their foreheads keep 
following you around

-the school geek gets a crush on you

-you never finish your homework. It's pure luck that you even start
it!

-you are never on time for school

-every time someone mentions something neat, you always say "Wicked
Cool!"

-you get a crush on about every guy/girl you see

-you grow blond meatballs on your head, even if you have a
different color hair

-people keep zapping your best friend's energy

-you eat a TON of food, but never gain more than a 1/2 pound

-the only sports you actually like are frisbee throwing, video 
games, and of course, sleeping

-people are always calling you meatball head, even your parents do!

-every day at school, you get a detention

-you always rank last place in the national exams

-you have never gotten more than a 31 on any test in your life

-your boyfriend/girlfriend seems to have dumped you for your cousin
and he/she is only in kindergarten!