After releasing their music video for "Ma Boy" earlier today, Starship Entertainment followed up by sharing hidden still-cuts of Bora from the set of SISTAR19's music video. Servers crashed moments after the release, demonstrating the explosive popularity these two ladies are already garnering for their first sub-unit promotions. Netizens took notice the sexy theme that's been ongoing since their first teaser release, and while some thought that it was a charming new image, others expressed concerns over the girls being caught up in another 'sexually suggestive' controversy. [gallery columns=4] Source: Newsen via Naver