Released: March 3, 2017

Buy buy buy谁叫我是爱买的女孩
Buy buy buy谁叫我是爱买的女孩
见好就买机会不再
Bye Bye Bye青春小鸟不再回来
敢做敢当敢爱敢买

Buy1 buy2继续的buy three
唇蜜眼影当然要换季
流行彩妆笔记要Ready
抢救美丽(有什么不可以)

Buy buy buy谁叫我是爱买的女孩
百变时代跟上节拍
Bye Bye Bye旧的不去新的不来
敢做敢当敢爱敢买

Buy1 buy2继续Buy下去
庞克短裙搭配件上衣
幸运手饰要整套收集
抢救经济(Come On)

Buy buy buy谁叫我是爱买的女孩
见好就买机会不再
Bye Bye Bye青春小鸟不再回来
敢做敢当敢爱敢买

限量改版专柜地摊
追求Fashion不一定会变坏

RAP:
靓妹妹
破了好多洞的裤子也要买有没有搞错啊
都快要夏天你还买围巾有没有搞错啊
喂那是男生用的你们干嘛买嘞顶解啊
啊这个东西怎么那么便宜猴塞利啊

By2

BY2 consists of Singaporean twin sisters Miko (孫涵) and Yumi Bai (孫雨) who were born in Yio Chu Kang, Singapore on March 23, 1992— Miko is the eldest of the two while Yumi is the youngest. They are among the most internationally recognized Singaporean acts alongside the likes of JJ Lin and Stefanie Sun.

The twins had a passion for dance and music at a very young age, as they learned violin, piano, ballet, and many other styles of dancing such as Chinese traditional folk and ballet. As they grew older, they learned more modern forms of dance such as hip hop and street dance; their father was a driving force in nurturing the twins' career in music. However, he would pass away in 2007 before witnessing his daughters' debut and rise to stardom.

In 2007, they moved to Taiwan and joined Ocean Butterflies' Music Forest’s V Singer (“非常歌手”) training course at the age of 13 where they graduated with a “Best Costume Design” award and were granted a 10-year contract after being noticed by Billy Koh of Ocean Butterflies Music. Miko and Yumi were later sent to various countries in order to train and hone in their vocals and dancing skills.