nice!
a few things though. it really could have done with more than just a line lol. i know that frame by frame can be a bitch to do, and also its hard to make it look right. try maybe having the lines kill each other or something, rather than dance around?
that sounded stupid lol. well the song ive loved ever since i heard it earlier this year. but, like any song, it gets old when overdone. this song has entered the same course as "hey ya!" and whatnot, so please dont use it in the future. there are plenty of others that can be used. next time, try doing like people or something, then it gets really fun.
you can take the frame and copy it to a layer underneath of the one your working on, and then set it to only show the sides instead of completely visible, then trace. its alot easier that way. you probably already knew this though V.V