Girl's Day announce project single 'Hello Bubble'

Girl's Day are treating fans a project song 'Hello Bubble' before their comeback. The song is a work of Duble Sidekick for 'Mise en Scene'.

The girls are releasing the song for their endorsed hair essentials brand on May 12 along with an MV.

In the teaser photo, we see the girls' silhouettes on a red limelight. We can expect an overall performance from this release.