The girl group KARA, who debuted in 2007, has come back as a 4-member group with their new member Heo Youngji.
Their title track "Mamma Mia" has a repetitive thook and lyrics, in the style of former KARA hits "LUPIN" and "STEP".
The song is about a girl who promises to show off all her charms through an exciting nighttime party.