June 16 (UPI) -- South Korean girl group Twice is commemorating 10 years together with a new studio album, This is For . The K-pop stars teased their upcoming release with a short video Monday. The clip shows a vanilla cake with red frosting that appears to say This is For . The album "is a celebration for Twice and Once," an official description reads , referring to the group's fan base, known as Once. Twice consists of members Momo, Sana, Nayeon, Tzuyu, Jihyo, Chaeyoung, Jeongyeon, Mina and