im pretty sure they used some sort of voice correction device
the crowd really interferes with the device because all of the different pitches it hears
dude... that guy is sickk
this guy is just as good or even better
http://www.youtube.com/user/michael37SJC
and his paramore covers
http://www.myspace.com/mikelisa39srecordings
hahaa
remember in that interview on SURS at warped tour hayley was like "well your butt does stick out kinda far"
http://fuse.tv/videos/index.php?p=clip2936