Girl's Day continue to treat fans with their hot new track titled "Expectation" from their first album of the same name.

The girls have definitely gone through a change, once again setting aside their trademark aegyo concepts for a much stronger, sexier image that should drive their fanboys crazy!

The title track "Expectation", an electronic dance song, expresses a girl's determination to catch the handsome guy she has her eyes set on and change his playboy ways.

Don't miss out on Girl's Day comeback stage, featuring their already-popular smooth moves, below!