B1A4 is really laying it on thick with teasers for their anticipated 5th mini-album 'Solo Day,' and fans can't be more excited (and more impatient)! �They released the fourth short teaser today in which the adorable members, going for a very summery feel with this release, seem to spot something in the sky.

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Is it a bird? �Is it a plane? �Well, it's not Superman, but perhaps it's a UFO harboring the alien child? �Unfortunately, the teaser does not satisfy fans' curiosity, but they do greatly amuse as the boys strike comic expressions of shock while Baro remains adorably oblivious until the end.�