Day by Day is the fourth extended play by South Korean girl group T-ara, released on July 3, 2012, by Core Contents Media. The album marked the first appearance of the group's eighth member, Areum, and the last appearance of member Ryu Hwayoung. A repackaged version of the EP, titled Mirage, was released on September 4, 2012. "Sexy Love" was released as the lead single from the Mirage repackage.