Without hesitation your hand seems to move of it's own accord across the the slip of paper: 16 (your current age), 5'11" and 150 pounds.
Your body seems to ripple around you as our height drops a few inches and your body and clothes shift around to adjust, and you feel your ass seem to bloat out slightly as weight shifts and moves around until you feel like your sitting on a soft, comfy pillow.
Looking at the slip of paper in a panic you realize you've reached the last question! Suddenly your curvy pink writing slowly begins to erase itself off of the paper until it's left as blank as when you started out.
"Oh god...." you whisper to yourself in a high bubbly voice, "I'm stuck like this!"
You look wildly around the room, your blonde hair flipping around your shoulders, looking for whoever could have given you the note in the first place. You weren't a girl, you needed to change back!
"Is there a problem, Ms. Sunnytush?" Your teacher asks and you realize everyone is looking at you, is that your new name?!
"N-no Mr. Bard" You stammer in that incessantly perky voice as he turns back to the blackboard and everyone else turns back to their own work, some chuckling to themselves.