Okay, its confirm. Its Shinhye's twitter for real!
Twitter address: http://twitter.com/ssinz
Twitter profile pic:
The twitter has just opened yesterday evening, and the 1st tweet mesg is:
신혜도..드디어 트위터시작
Translate: I finally started Shinhye's twitter
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Is this what she meant by gaining more popularity in her CY's header? Follow her on twitter now!