Group B1A4, who returns with country pop song "Solo Day", released their fifth teaser clip "#4 UFO?" on July 11.

In the clip, Baro is smiling widely holding a transmitter to the sky while the rest of the members stand in shock at the sight behind Baro.

Shinwoo stands transfixed, not realizing that water is spilling from his water bottle. What the members saw is left to the imagination of viewers.

B1A4's fifth mini album title song "Solo Day", projected to release on July 14, is an easy-to-sing-along country pop song with a sentimental beat.

The music video maximizes the fresh and natural look of the B1A4 members. The clips were filmed in California.

Meanwhile, B1A4 will release their fifth album on July 14.