Tác giả: Will Simms & Yoo Young Jin & Chad Hugo
Ca sỹ thể hiện: Red Velvet
Sometimes, you gotta be bold! Just rock the world! Boo-yah~. Lalala lalala lalalala (happiness). Lalala lalala lalalala. (Are you happy? Uh~). Gomineun go up. Kkulkkulhan gibun train jump. Himeul naeryeogo ije wind.