B1A4 have finally made their long-anticipated comeback with "What's Going On?"!

B1A4 took a more serious turn for their last song "Try to Walk", but now they're back to their fun times with "What's Going On?" The song is produced, written, and composed by their leader�Jinyoung, and the boys sure seem to be enjoying the song!

Check out their comeback performance below on 'Inkigayo'!