2013年5月6日韩国男生组合B1A4推出最新迷你专辑《What's Going On 》，宣布正式发售，而同时公开的宣传照中成员BARO摆可爱风格，以干练短发和浓厚妆容登场，彰显熟男魅力，而西装上又以各式华丽抢眼饰品搭配，打破成员们原有的朋克风格。
B1A4 won over many new fans last year with their hit song "Tried to Walk" and impressive performance on Immortal Song 2. Their fourth mini-album continues B1A4's distinctive and youthful style with five new tracks. The members again participated in the songwriting for the album. Leader Jin Young composed "What's Going On" and Good Love, which is co-written with Baro and CNU.
1. 별빛의 노래
2. 이게 무슨 일이야
4. Good Love
5. 몇 번을