Any South Park fans?
I discovered a little while ago that the Jonas Brothers actually did frequently spray white foam on their primarily female concert goers.
Here's a clip of the foam spraying from one of their concerts: youtube.com
Some quotes from the comment section of the YouTube clip:
"i thought this was just a south park joke. my God...."
"right? then my girlfriend told me: "no, they really do that at their concerts" which is how i ended up here"
A cursory Google image search for "jonas brothers white foam" yields some pretty hilarious, but safe for work results.
Images of chunky white foam, a confused female with some white foam chunks on her, and a happy female with some white foam chunks on her.
LOL Must help get that purity ring off.