Machine Gun Kelly aka MGK and Ester Dean look for win #4 tonight with 'Invincible'.

Childish Gambino looks to end that run with 'Firefly'.

Who will you vote for?  Listen to the tracks and vote for your favorite, then call Ian in the studio and let him know whats up!

MGK Feat. Ester Dean - Invincible

Childish Gambino - Fire Fly