After treating us to their second mini album yesterday, TaeTiSeo have finally unleashed their music video for title track 'Holler'!

Although they looked delicate and laid back in their teaser pictures, Seohyun, Tiffany, and Taeyeon dress up to project a more bold image for the music video, throughout which they sport quite a number of outfit changes.

Check out the beautiful ladies who go from casual to glamorous in the video below!