Yuk Ji-dam is a South Korean rapper from Daegu. She gained popularity with her participation on the hip hop TV competitions Show Me The Money and Unpretty Rapstar. She returned to Unpretty Rapstar 3 as a contestant.

A+ is the fourth extended play (EP) by South Korean singer Hyuna. It was released on August 21, 2015, by Cube Entertainment and distributed by Universal Music. The EP consists of five tracks and incorporates Pop, R&B and Hip hop music genres. The physical album was released three days later on August 24. To promote the EP, Hyuna appeared on several South Korean music programs, including Music Bank, Show! Music Core and Inkigayo. "Roll Deep" was released as the lead single alongside the EP release.