MSN Entertainment / Music - Rock & Roll's Ten Wackiest Pranks - April Fool's Day is here again, bringing back fond childhood memories of mischief: water balloons, whoopie cushions, joy buzzers, salt in the sugar bowl, etc. Since most rock stars never really seem to grow up, the world of rock & roll has long been a fertile territory for pranks, hoaxes and practical jokes. In honor of the silliest day of the year, we proudly present rock's ten wackiest pranks. Some were premeditated, some impulsive; some were dopey, some were brilliant; some were light-hearted, while others were hilariously vicious. But all of them deserve a place in the pop culture firmament, as well as in our naughty little rock & roll hearts.