SISTAR's Hyorin will be lending her voice for the main song in the soundtrack to 'How To Love Smart'. Titled "I Choose to Love You", a short snippet of the song can be heard through the teaser clip released by the production team today. "I Choose To Love You" was originally sung by 'Zoo', but Hyorin opted to showcase a brighter, strong sound with her signature powerhouse vocals. The video clip also includes scenes of a love triangle between lead actors Han Hyo Joo, Lee Jae Hoon, and a second man. The full audio for "I Choose to Love You" as well as the full MV will be released at the 'How to Love Smart' culture concert on January 19th, which fans can apply to attend through www.mirrorpop.co.kr. Check out the teaser clip below!