B1A4 released an album medley teaser video filled with 15-second samples of the songs from their upcoming second album 'Who Am I'!

SEE ALSO: B1A4 release the drama version MV teaser for 'Lonely'

Some songs are soothing while others are more upbeat and catchy, but in all of them, the boys showcase their great vocals and harmonies.  The album will be out on January 13! 

Which song do you think might become your favorite track based on the samples above?

Tip: squirrrelle