Look at these pictures in order:
http://i804.photobucket.com/albums/yy322/HatsuneMikuTheVocaloid/Spiral%2...
http://i804.photobucket.com/albums/yy322/HatsuneMikuTheVocaloid/Spiral%2...
http://i804.photobucket.com/albums/yy322/HatsuneMikuTheVocaloid/Spiral%2...
Also, I have no idea who Watermelon-Gummy is, although obviously he/she doesn't exist anymore. There's also a Watermelon-Cream which is a fake as well.
The only legit Watermelon Brigade characters:
Watermelon-Soda
Watermelon-Slush
Watermelon-Cake
Watermelon-Juice
Watermelon-Punch
Watermelon-Plush
Watermelon-Bomb
Watermelon-Candy
Watermelon-Lolly
Also, another unexplainable incident:
http://i804.photobucket.com/albums/yy322/HatsuneMikuTheVocaloid/Spiral%2...
From the looks of it, you've been hacked. I'm not so sure, though. It's the only explaination I thought of, other than that you're messing with us.