We've all been there–blissfully blasting your favorite band's new record and being introduced to a fresh set of new songs that already feel familiar and then...all of a sudden...it hits you like a sonic-suckerpunch out of nowhere. The one song that sounds different–so different, in fact, that you question whether or not it's the band you thought you were listening to.

Here are ten songs that celebrate a change in style and revel in experimentation. The tracks that blow the walls off of the boxes that musicians are often jammed into and test the limits of creativity. These are ten unexpected gems that challenge the listener, push artistic boundaries and force you turn down the volume and ask "Who's this from?!?!" (What did you think "WTF" stood for?).