Actress Goo Hye Sun has just released a preview for her new upcoming digital single and it seems really impressive! What has Goo Hye Sun not achieved? For those who don't know, Goo Hye Sun is an actress that was the lead female role in famous drama, "??? ??" or "Boys Over Flowers." From there on she has written a book titled, "Tango" and held an art gallery to show her beautiful art pieces to the world. Now she is debuting as a singer, she really is an overachiever if you ask me! Check out her title song preview, Round the Alley feat. Gummy. Goo Hye Sun will also be having her album commemorative concert, Over the Rainbow on 5th September, featuring famous Japanese entertainer, Isao Sasaki. Her musical album, Breath drops on 4th September, tomorrow.