Do it amazing DIA! Hello, we are DIA! DIA (다이아; short for DIAMOND, also known as Do It Amazing) is a seven-member girl group under MBK Entertainment. They debuted on September 14, 2015 with the album Do It Amazing.
On September 14, 2015, the group made their official debut with the release of their first studio album, "Do It Amazing", and its title track "Somehow".
A few months later, on October 20, the group released their first digital single, a track from their debut album, "My Friend's Boyfriend". The single features a version of the song featuring singer Joosuc.
On December 17, MBK Entertainment stated that members Chaeyeon and Cathy would withdraw from group's activities to participate in Mnet's new survival reality show, Produce 101.